DSL HOWTO for Linux

David Fannin

     dfannin@sushisoft.com
    

Edited by

Greg LeBlanc

 - ({)

hisai@din.or.jp

v1.1, 14 November 2000

Revision History                                                       
Revision v1.3             2001-06-25          Revised by: hb           
̃ZNVXVB                                           
Revision v1.2             2001-03-28          Revised by: hb           
lXȕύXƒǉB                                                     
Revision v1.1             2000-11-14          Revised by: hb           
GƂAXVB                                       
Revision v0.99            2000-09-05          Revised by: hb           
XVAǉ낢BVZNVǉB                           
Revision v0.92            1999-04-10          Revised by: df           
(ADSL mini HOWTO)B                                                

 

̃hLgł́ADSL t@~[ɂĐ܂BȃC^[
lbgET[rXSE̗lXȎs DSL t@~[͓WJĂ܂B
DSL ɂĂ̋ZpIwiƂƂɁA@ݒuAݒAguV[
eBOɂĂ̏ Linux [UɊ֘AƂɏœ_𓖂ĂďЉ
Ă܂B

 

Table of Contents
1. ͂߂
   
    1.1. hLg̍\Ɠǂݐiߕ
    1.2. ŐV
    1.3. Copyright
    1.4. ӎ
    1.5. disclaimer
    1.6. tB[hobN
    1.7. 񑩎Ɨp@Ap
   
2. ݒu
   
    2.1. Oݒu
    2.2. ݒuɂẴIvV\ł邩AȂ
    2.3. zƐݒũIvV
    2.4. [UŐݒu\zɂ
    2.5. zƃXvb^
    2.6. DSL WbNz
    2.7. }CNtB^̐ݒu
    2.8. C[TlbgEf̐ݒ
    2.9. USB f̐ݒu
   
3. Linux ̐ݒ
   
    3.1. ubW vs PPPoX lbg[N
    3.2. WAN C^tF[X̐ݒ
    3.3. ڑ
   
4. SȐڑ
   
    4.1. ZLeBENCbNEX^[g
    4.2. ǂ̃|[gǂH
    4.3. inetd
   
5. ptH[}XE`[jOƃguV[eBO
   
    5.1. `[jO
    5.2. ݒu̖
    5.3. ̖
    5.4. lbg[NƃX[vbg̖
    5.5. X[vbǧv
   
6. t^: DSL ̊T
   
    6.1. DSL ̒
    6.2. DSLAM
    6.3. DSL f
    6.4. ISP Ƃ̐ڑ
    6.5. AxCreB(p)
    6.6. voC_I
   
7. t^: FAQ
8. t^F̑
   
    8.1. NW
    8.2. p
    8.3. ̑̈ʏҌT[rX
    8.4. ݊f
    8.5. Linux ɍDӓI ISP
    8.6. Linux [^ƂĐݒ肷
   
9. t^ Alcatel SpeedTouch USB ADSL f
   
    9.1. ͂߂
    9.2. J[lɃpb`𓖂Ă
    9.3. J[l̐ݒ
    9.4. \tgEFÃCXg[
    9.5. \tgEFA̐ݒ
   
10. {Ŏӎ

1. ͂߂

DSL(Digital Subscriber Loop) ͍ȃC^[lbgEANZXZpŁA
ʓIȃ^̓db(dbЂ̐pŁAʖ "Γ")g
܂BDSL ́A̓dbЂ̃lbg[NgāAISP Ƀ_CNg
pŐڑł܂Bč 80 % ̓dbŗpł悤ɐ݌v
Ă܂BDSL ́AKϒgƂɂA 8 Mbps 
ɍȓ]xł܂B 

DSL T[rX́Aƒ⏬K͎ƌs^[QbgɂĂ܂B
DSL  ISDN ŁAT1 肩ȂT[rX񋟂܂B
T1 Ɍ悤ȃRXgʓ|ApɂƂCɂ
ɁAT1 荂ɗpł\܂BDSL "펞"pŐڑ
T[rXȂ̂ŁAISDN ̂悤ɉݒu̒xg邱
Ƃ͂܂B̓_шsŔYłlXɂƂĖ͂Zp
ȂĂ܂B 

ꂵƂ炯̂悤Ɏv܂ADSL ɂ͌_܂BDSL ̐M
܂ڑ́A(Γ""̒)₻̑lXȗvɈˑ
Ă܂BWƂȂ "DSL" ܂BlX DSL ݂ĂADSL
voC_͖{ɗlXȕ@Ńlbg[N񋟂Ă܂B Linux
[ÚAŉƂȂ΂Ȃ󋵂ɂ܂BƂ̂ DSL
voC_͈Ղ"؂" Iy[eBOEVXeɑ΂ĂA
łB

 HOWTO ŐGgsbNX́AKݒuɓĂ̎OƁA
uAݒAguV[eBOA DSL ڑSɍsƂłB
̊֘AgsbNɂG܂Bt^ƂĕI DSL ̊TFAQA
NWAėptĂ܂B

dbЂ DSL voC_y[Xňڂς̂ŁÃhL
gŐVłł邱ƂKmFĂB݁Ał http://
www.linuxdoc.org/HOWTO/DSL-HOWTO/ ɂ܂BOJł http://
feenix.burgiss.net/ldp/adsl/ ɂ܂B 

 

1.1. hLg̍\Ɠǂݐiߕ

̃hLgł DSL ɂčL͈͂ɋc_łBGɂ
݂lbg[Nn[hEFAAV̋ZpAĂ낢
x_[񋟂lXȃAv[`gsbNpxŉ
ĂłB̃hLg̍\̒S͉L̒ʂłB

 E ݒuZNVł́ADSL ̃n[hEFAƊ֘A@̐ݒu@
    ܂Bz̒ӓ_Xvb^}CNtB^Aflbg
    [NEJ[h̎t܂B
   
 E Linux ̐ݒZNVł́AɃNCAgƃ\tgEFAɂ
    Ĉ܂Bڑē\ɂ܂Blbg[NEJ[h̐ݒ
    ẮAL̐ݒu@̃ZNVň܂B
   
 E SɐڑZNVł́A펞ڑɓĔɏdvA
    ZLeB̈ӖɂĐ܂B Linux [U̓NbJ[̕W
    IɂƂĂȂ₷悤łBLinux [U͂ƂĂ炩ŁAZL
    eBɑ؂ŐkȂ̂𗝉łȂl邩łB
   
 E `[jOƃguV[eBOZNVł́Aݒuƌɂ
    ɐڑ̐\コ邩AƂgsbNRs[^ł܂
    Ă܂AXؒfĂ܂˂~߂@ɂĐ
    ܂B
   
 E t^ĂāALinux  DSL ɊւlXȃgsbNɂ
    ĐĂ܂B܂ڑēƂɒڊ֘AĂȂA
    [ɂĂ܂B
   
̃hLgǂݐi߂ɂ́AL̃KChCɏ]Ă݂Ă
B܂Ku͂߂ɁvǂłBɖ񑩎Ɨp@ApZ
NV͏nǂĂBp̒ɂ͕ʂ̕ɂāAق
Ӗ̂邩łB܂ATA(dbƊE̓)̐EŖ
Ă܂ĂAppӂĂ܂ ;-)B

 E DSL ɂĉmȂĂÃhLgʓǂł͂ł
    B܂t^ɂDSL ̊TZNV͂߂āA FAQ ɐi
    ݂ĂB DSL ̊Tł́AꂼX̗vfǂ̂悤ɑgݍ
    킳Ă̂܂BDSL lbg[N͂܂ł̃_C
    AbvElbg[NɔׂāAGȍ\ƂĂ܂B
   
 E łɉׂĂ邪A܂ǂɂT[rX\łȂ
    AvoC_IԃZNVǂłB킹 Linux ɍD
    ӓI ISP ZNVǂł݂ĂB Linux ̐ݒZ
    NV͂߂Ă\łBꂩ牽Ȃ΂Ȃ̂
    AłƎv܂B
   
 E ɃT[rX\łăT[rXJn҂ĂԂȂAv
    oC_̑IɂẴZNV͔΂Ă܂܂BŐ
    uȂAݒu Linux ̐ݒASɐڑ̂ꂼ̃Z
    NVŁAY镔ǂłB
   
 E ݒûɂ܂ڑłȂȂAɃguV[eB
    OZNVǂłBǂȃvgRgĂ͂
    肵ȂAǂȃ\tgEFACXg[΂̂
    Ȃ肵ȂA Linux ̐ݒǂłBhLg
    ""Ƃ悤ȈӖsȌtꍇ́ADSL ̊TK
    ǂłB΂肭͂łB
   
 E P[uf DSL ߂˂ĂȂA Cable vs DSL ZNV
    ǂłB DSL ̊Tǂ񂾕܂B
   
 E C^[lbgɏ펞ڑoȂASɐڑ@
    ɂ͗łĂȂȂASɐڑZNVKǂ
    BǂłłȂ_ȂAJԂǂނAʂ̎
    {悤ɂĂB
   
 E NWł́ÃhLgł͒ڈĂȂgsbNɂ
    LЉĂ܂B
   
 

1.2. ŐV

Version 1.3:t^ SpeedTouch USB HOWTO XVB PPPoE ZNV
ALinux ɍDӓI ISP  2 ВǉBhLgč𒆐SƂL
qɂȂȂ悤ɁAق̏CB̑̍XVB 

Version 1.2 ɂ PPTP ̐ݒ Alcatel ̃C[TlbgEfǉB "
`[jO"ZNV TCP Receive window  ADSL  DMT ̌
 2 ǉBAlcatel  USB f̃hCoI[vE\[X
2001 N 5 Ƀ[XꂽƂrbNj[XǉBChris Jones 
ɂ Alcatel SpeedTouch USB mini HOWTO t^ɒǉBXV
B

Version 1.1 ł͂̒ƍXVƒǉBV͎ȂB
 Linux ŗp\ Xpeed  DSL PCI foBJ[l 2.2.18 
\[XR[hɃhCoB 

Version .99 ͂̃hLg̃IWił ADSL mini HOWTO o
琶ύX_̓̂ɑΉB ADSL ͍ŏɍL
 DSL Zpł͂邪A DSL\IDSL  SDSLAG.LiteARADSL\̓
fĂB̂悤ɂ "ADSL mini HOWTO"  "DSL HOWTO" 
̂ύXB܂ DSL Zpɂ鐔̐iWLqB PPPoE/A
ɂJvZ͔ɑ ISP ō̗pĂĂA嗬ɂȂĂ
ĂB 

 

1.3. Copyright

DSL HOWTO for Linux (formerly the ADSL mini HOWTO)

Copyright 1998,1999 David Fannin.

This document is free; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.

This document is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.

You can get a copy of the GNU GPL at at GNU GPL <http://www.gnu.org/
copyleft/gpl.html>.

 

1.4. ӎ

 HOWTO `ĂꂽׂĂɊӒv܂B̂߁Adq
[̃AhX spam Ă܂(̂̂I)BO̕
X ĂB

 E B Ediger (Xbediger@csn.net) ̖_ɂĂ̂΂炵Lq
   
 E C Wiesner ( Xcraig@wkmn.com)  ADSL ֘Äꗗ쐬
   
 E J Leeuw ( Xjacco2@dds.nl) ADSL ɂĂ̂ TIPS
   
 E N Silberstein ( Xnick@tpdinc.com) Netrunner ɂĂ̏ƕč
    ߎSȌo
   
 E comp.dcom.xdsl  bellsouth.net.support.adsl ̑푽lȓeB
    ܂ɑʂŌXɌyłȂقǁB (HB)(H)
   
 E Juha Saarinen TCP Receive Window ɂẴAhoCXƉyт
    Ɋ֘A`[jOɂẴgsbNB
   
 E Chris Jones <chris@black-sun.co.uk> t^ɂ Alcatel SpeedTouch
    USB mini HOWTO ̒ҁB
   
 

1.5. disclaimer

The authors accept no liability for the contents of this document. Use
the concepts, examples and other content at your own risk. As this is a
new edition, there may be errors and inaccuracies. Hopefully these are
few and far between. The author(s) do not accept any responsibility for
incorrect or misleading information, and would certainly appreciate any
corrections. Also, this type of technology dates itself very quickly.
What may be true today, is not guaranteed to be true tomorrow. 

All copyrights are held by their by their respective owners, unless
specifically noted otherwise. Use of a term in this document should not
be regarded as affecting the validity of any trademark or service mark.

References to any particular product, brand, service or company should
not be construed as an endorsement or recommendation. 

 

1.6. tB[hobN

̃hLgւ̂ǂȃRg}܂BŐVł`FbNĂ
A𗬂ĂIĐ <hal@foobox.net> ܂ŁB

 

1.7. 񑩎Ɨp@Ap

ꂩ炷𗝉₷悤ɁÃhLgŎgĂp
̂𖾊mɂĂ܂傤B̗p͂ɓoꂵ܂̂
BLɓoꂷ`̂قƂǂ́AZpI 100 % mł͂܂B
Ał̖ړI͏[ɃJo[Ă܂BDSL ̂悤ɂ߂܂邵
Zpł́A"A"ƂtpɂɌ܂B͂
ǂ̒xmŁAǂ̒x肵Ă邩fłȂł
BėOɂ܂Ƃ܂Bł͂ł邾LʓIɈ
ł̂ŁASɗ߂ĂĂB 

 E "DSL" ͌ݗp\ DSL ZpŜӖꍇɎg܂B\
    ADSL  SDSLAIDSLARADSL ɓ܂BADSL ͍łł
    yĂƎv܂Ȃ̂̂ǂǂg債Ă܂B
     DSL ʂꍇɑ؂Ȃ̂́ÂpȂŗLg
    ƂłBƂ΁A RADSL Ƃ悤ɁBxDSL ͗lX DSL Zp
    ̂ꍇɕʎg܂BAł "DSL" Ƃtg
    B
   
 E Ō"db"Ƃt́ADSL voC_ɂȂƂw
    ܂Bɂ͕ʖ ILEC (Incumbent Local Exchange Carrier)
    ACovad  Rhythms ̂悤ȕč̓ƗñvoC_܂B
   
 E "CO" ́AdbЂ̗p"db"Ӗ܂B܂ł͂̌t
    Al̓dbIɏI[Ă錚ӖĂ܂B
    ̃hLgł́AdbЂ̏I[_wƂɂ܂B̌t
    dbǂ̌Ȃ̂Ał͂Ȃ菬ꂽꏊɂ\
    ̓foCXȂ̂YޕKv͂܂B
   
 E ""́AdbЂƂ"db"łBƂ΁Aʂ
    ΓItBX璼ڐp CO ɂȂĂ
    lĂƎv܂B񂱂͂܂ɒPĂ܂Ă
    ̂łÃhLgł͌Ƃ邱Ƃ[ɓ`Ă܂
    BDSL pł邩ǂM̕íAIȓdb\db
    ̌ ""\̎ɒډe󂯂Ă܂B
   
 E "POTS" ͐̂̓dbT[rX̓łB܂ÂȂ̃fW^
    ĂȂdb@ FAXAԓdb̂悤ȃfoCXw܂B
   
 E "NID"(Network Interface Device)́AdbЂƂ̊Oǂɐݒu鏬
    ȃfoCXŁAdbЂ̃T[rX󂯂ɓ܂Bdb
    Ђɂďꏊ͈قȂ܂Aǂɂł傤B"ONI "  "SNI"
    A"NIU"A"TNI" XAdbЂɂĂ낢قȂ܂B̃fo
    CX̂ƂŌڋqƓdbЂ"E"_݂Ă܂BƎ{݂W
    Z̏ꍇ͂ƃX}[gɌ̓̂ǂɐݒuĂ܂
    B
   
 E "DSLAM" ͓dbЂ CO ̒łxȃn[hEFAEfoCXłB
    DSLAM œdb𕨗IɏI[A DSL 藧Ă܂Bdb
    Ђ "mini-RAM" ̂悤ȏȃfoCXڋqɐݒu悤ɂ
    ĂĂ܂Bł "DSLAM" Ƃ́AdbЂ񋟂 DSL 
    邠foCXӖ܂B݂ł͑̊Ƃ̋@
    YĂ܂B
   
 E "f"̓GhE[U DSL ɐڑfoCXłBf͓db
    ǂɂ DSLAM ɉłȂĂ܂BDSLg" b"A"
    "܂B""Ȃ΁AISP ւ͐ڑł܂B
   
    "f"͐M̕ϒƕ(MOdulation and DEModulation)Ӗ鐳
    ȗpłBɌ΁AȑOFpĂAi
    ÕfoCXł͂܂B̃f͕ʂ͑̋@\
    Ă܂B ISP ␻Ǝ҂̒ɂ́AP"[^[""ubW "AX
    ɂ"u[^["ƂĔ荞łƂ悤łB
    {I DSL f@\ĝłB݊fƌĂ΂
    ̒ɂ́Aڋq̐ڑɕKvȍŒ̃n[hEFAȂ
    ܂BLsnĂ郂f́Aۂɂ̓ubWƃf
    gݍ킹قƂǂłB
   
    ɖLȂA"f"ɂ̓C[TlbgEC^tF[X
    AWIȃC[TlbgEJ[h(NIC)łȂƉ肵܂B|I
    yĂ̂̕@łBȂƂ PCI  USB f Linux
    phCoXɕy܂ł́Ǎ`ōsł傤B
   
    DSL voC_xĂ"[^["́AʓIɂ̓fƃ[^
    [gݍ킹foCXłAOɐ[Ӗ͂܂B̃h
    Lgł́Â悤ȃfoCX"[^["Ƃ݂Ȃ܂BSOHO p
    ̃u[hohE[^[܂Ap[^[łāAf
    ̋@\͂܂B
   
 E ł̃hLgł́Af"ANT"(ADSL Network Termination)Ƃ
    Ă܂B͋ZpIɂ͐pƌčx܂
    AISP ⃁[J[AdbЁA܂[Uł̌tgĂ
    Bǂȋ@\(Ƃ΃[^[ubW)ĂĂA "
    f"̓fłB
   
 E PPPoX  PPPoE(PPP over Ethernet)  PPPoA(PPP over ATM)𑍏̂
    ĂԏꍇɎg܂B݂̃vgŔADSL voC_̑
    pĂ܂B
   
 E ̃hLg񋟂́Ačɂ DSL ݂̌̏󋵂Ɋ
    ÂĂ܂BčȊO DSL T[rXقƂǓƎv܂̂
    AFɂɗ̂ł͂Ȃł傤BԈႢΒĂ
    Bdq[ <hal@foobox.net>܂ŁB
   
 E "#" ́Aʏ root sR}hӖ܂B "$" ́A
    [ŨvvgƂĎg܂B
   
 

2. ݒu

T[rX\ޑOɁAׂĂł傤B͓K
ݒu葱dbЂlXɎ茈߂Ă邩łBčł͂̃Z
NVŐ邱Ƃ̑ʓIɍsĂ܂B

 

2.1. Oݒu

DSL I]nȂ͐Eɂ܂B݂̓dbЂ
܂IΓLĂ܂AׂĂĂ킯
łB

čł͂ł͂܂BKɘaɂĂȂ܂B
ɂĂ͂ȂA̒n DSL T[rX񋟂Ă鑼̃voC_
𒲍ׂR͂񂠂܂BK͂ȓdbЂ͂ɂ
A炭ɐ`Ăł傤BAK͂ȓƗn ISP ܂
܂Ă܂Bꂪ DSL s̑lYݏoĂ܂Bl
ǂƂȂ̂łANĂ邩܂BtɌ
΁A̒nɂ 1 Ȃ΁AI̗]n͂܂BT
[rXłA󂯂邱Ƃ͂ł܂B 

dbЂdb DSL T[rXƐ肵ĂȂÃZNV̌㔼
Ȍ㐔ZNV͔΂ĂBdbЂ͓Kݒuɂ
Ƃmɍs܂̂ŁAÎ҂ĂΑvłB

DSL T[rXׂĂłƂ͌܂Bn 2 ̊Ƃ "
ADSL" 񋟂ĂĂAȂׂƂʂĂƂ͌܂B
ɂ̗͂v݂ĂAꂪ ADSL voC_̃T[rX
Ƒ̃voC_̃T[rXقȂĂvƂȂĂ܂BlȂ
΂ȂƂ́AL̒ʂłB 

 E x vs 
   
 E ǂȃn[hEFAxĂ邩BȂ킿AfȂ̂[^[
    Ȃ̂Bǂ̃P[XłC[TlbgtĂ̂xXgB
   
 E ISP ̃lbg[N\BPPPoX HŒ IP HT[o͗Ă
    H
   
 E "펞ڑ"𗝘_łĂT[rXƂĒ񋟂Ă邩Hǉp
    ́HAChE^CAEǵH
   
 E Linux ɑ΂āADӓIHGHeH
   
 E T[rX̎́Hj[Xdq[́H
   
猟ׂƁA֘AƂɂẮA DSL ̊T̕t^ɂ郂
fT[rXiAvoC_IԂɂčXɏڂc_Ă܂
ŁAǂłB

voC_߂āAT[rX\񂾂A͓dbЂK
Ă邩`FbN܂B̍ƂœdbeXgADSL ̐M
Ƃł邩`FbNAǂ̒x̃T[rX񋟉\Ȃ̂mF
܂B̍Ƃ͑Ԃ邩܂BdbЂ̖
ɏo킵ꍇɂ͂ȂłB̒iKŉ肪Ȃꍇ́A
炭 2A3 TԌɐݒu܂BP[XEoCEP[XłB

dbЂ̎sAdbǑ̏I[̏ƁÃXe
bv͌ڋqɕKvɂȂ@̐ݒuƂȂ܂BzHƃXvb^At
B^̐ݒus܂B񃂃fƃ\tgEFA̐ݒs܂B 

 

2.2. ݒuɂẴIvV\ł邩AȂ

ɂǂ̂悤ɐݒûANݒû߂ǂƂiK
ł͂Ȃł傤B̌̓voC_̍ٗʔCɂȂ܂B唼̍
́AdbЂ̖𕉂ĂāAقƂǗZʂ܂Bč̃v
oC_̑́A"[Uɂݒu"IvVpӂĂāAŖ
܂B̕@łƃvoC_͐ڑLbg𑗂邾ŁAZp҂
hԂȂARXg邱Ƃł܂BʓIɂ̓[Uݒu
Lbgɂ POTS(Plain Old Telephone Service)p̃}CNtB^Ɠdb
WbNAf( NIC)AăhCo CD-ROM 
Ă܂BꍇɂĂ̓}CNtB^̑ւɃXvb^
Ă邩܂B̃P[XłADSL CłȂɁA
炩̃tB^KvɂȂ܂BDSL ̐MŔmCY POTS fo
CXɉe^邩ȂłB 

̑̑IƂāAvoC_ݒup^[܂BJԂ
܂A̓IvVłBRXgɂȂ܂APς񂾋Zp
ǂ̂悤ȔzƂĂ܂BɑfGȃIvV󂯂
܂B "Xvb^ݒut"IvV(f炵I) 
B̃IvVgƁAAdbЂ
K؂ɕ~݂ĂȂƂĂAZp҂fITCgŐȏ
ɂł\܂B 

[Uݒup̃Lbgɂ́AڍׂȉĂ͂łBݒuXv
b^E^Cvł낤ƃtB^[E^Cvł낤Ɗ֌W͂܂B
āAł͂ȏڂG܂B

 

2.3. zƐݒũIvV

ẑ́Aǂ̂悤ɃT[rX񋟂ANƂsɂ
܂܂łB܂N DSL T[rX񋟂邩ɂ܂BdbЂ
ݒusȂÃZNV͔΂ĂB

 E pBDSL ̒ɂ"dbT[rXgĂȂ"p̂ΐK
    vƂ(Ƃ IDSL)܂B܂ DSL ŃC^[lbg
    ڑɂ́AdbƂ͕IɓƗĂāAg[Ȃ
    KvɂȂ܂B܂ CLEC(Covad  Rhythms ̂悤ȓƗndb
    ) DSL T[rX́ApKvɂȂ邩܂B͒n
    ŊɃT[rX񋟂ĂLA CLEC Ƃ̉p̍ӓ
    ełB(ނۂ CLEC  ILEC ؂Ă)PɃ
    [U͓dbЂłΐ̑󂢂Ă̂ 1
    𗘗pāADSL ̃WbN}łB
   
 E Xvb^ŉLBADSL ̂悤 DSLA܂蕁ʂ̓dbT[
    rX(POTS)Ɠĝ́A炩̕@ŐMɃtB^
    AɈełȂ悤ɂKv܂BXvb^ݒu
    ĉ 2 ɕȂ̐M DSL o܂B
    DSL ̓WbN 1 Ɍ肳̂ŁÃWbNׂ͂ēdbT[r
    XɎgzɂȂ܂B͂̕낢ȈӖ"Xvb^
    "^Cv (Ȃ킿}CNtB^g)ݒuDĂ܂
    BLQƂĂB
   
    Xvb^͂̃[J[ŐĂāA`A傫ƂlX
    B̂ NID(SNI Ƃ܂B͓dbЂOɐݒu
    dbp{bNXł)̒ɓقǏ[ɏ̂܂ANID
    Ɠ炢̑傫Ȃ̂܂Bʂ NID ̂΂ɎtA
    ڋqƂ̋E_ɂȂ܂B
   
 E tB^gĉL POTS ̉킹 DSL ̒
    ǂŃtB^A肷Kv݂̂
    ܂B G.Lite  RADSL ł͕KKvł͂܂B
    ͕ʂɁARJ11 Ă"}CNtB^ "dbWbNɂׂ
    t@܂\DSL f̂ƂāB̃tB
    ^͔rIAfoCXɍŎgADSL gp鍂g
    Jbg܂BzKvȂقǔɊȒPɐݒuł܂B
    ʏ탆[UݒupLbgɓĂA"Xvb^"^CvƌĂ
    Ă܂B͕čŔɈʓIȕ@łB
   
    f甭ĉɏĂ܂傫"G"̂ɁAd
    bЂ͓̃}CNtB^gpĂ܂BWbNɃfp
    ̃tB^_͓łAAv[`łB
   
 E Xvb^tB^ɉLBG.Lite ̂悤ȍŋ߂
    DSL ɂ́Aʂ̓dbT[rXɂ͉̉e^AtB^Xv
    b^Ȃ̂܂B͍̎嗬ɂȂƎv܂B
    {ɃvOvCłB܂ʓIł͂܂B
   
 

} 1: DSL ̃ubN}Xvb^L̓db (NID ͐})

       <--------Home/Office-----><---Loop---><--Central Office-->

 POTS  X-------+
 phone,        | 
 fax,          | 
 etc,          | 
               |                                 CO
               |                               -------
               |                               |     |
               |                               |     |
               |            -----              |     |
 POTS  X-------+----Voice--=| S |              |  D  |
                            | P |              |  S  |=- Voice Switch
                            | L |    2 wire    |  L  |
                            | I |=------------=|  A  |
                            | T |  Local Loop  |  M  |=- ISP --> INET
           ---------        | T |              |     |
 Linux X--=| Modem |=-Data-=| E |              |     |
           ---------        | R |              |     |
                            -----              |     |
                                               -------

    

} 2: Xvb^ DSL (ʖtB^^Cv) ̃ubN}

       <--------Home/Office-------><----Loop---><--Central Office-->
                                      
 
 POTS  X--Voice---[RJ11]------+
 phone,          (filter)     | 
 fax,                         D                      CO
 etc,                         a                    -------
                              t                    |     |
                              a                    |     |
 POTS  X--Voice---[RJ11]----- &                    |  D  |
                 (filter)     V  -----             |  S  |=
- Voice Switch
                              o  | N |   2 wire    |  L  |
                              i-=| I |=-----------=|  A  |
                              c  | D |  Local Loop |  M  |=- ISP -->
 INET
                              e  -----             |     |
           -----------        |                    |     |
 Linux X--=|  Modem  |=-------|                    |     |
           -----------                             -------
 
 
    

 

2.4. [UŐݒu\zɂ

ŐݒuȂ̂ȂÃZNV͔΂ Linux ̐ݒɐi
B}CNtB^gĐݒuȂ}CNtB^̃ZNV
ɐiłBꂩ̂́AẑɂĂłB
̏ꏊƂ͈ɂȂ邩Ȃ̂ŁAB
钍ӎSɊւɂ͕K]ĂB}jA
ǂŁAdbЂsz@ɂʂĂĂB 

܂ŏɃvoC_ɐڑ邱Ƃ͂߂܂傤BŃT[rX
͂܂Ă̂mFĂB킹ăXvb^ DSL p̃W
bNݒuĂ邩ƂƂmFĂ(ƂƗǂ
z@邩܂̂ŁAĹuz[EvZNV
ɌĂB 

dbЂ̂ΐ́AʓIɑ 1 Έȏ̐ɂȂĂ_m
ĂĂB2 ΂ʂłAȏ̏ꍇ܂B1 {
dbgĂȂ΁Ac̑΂͖gpłB̏ꍇ DSL p
ɔzł܂B̑΂͐FĂAȒPɋʂł܂BSDSL 
IDSL ́Ap "dbT[rXł͎gĂȂ"ΐKvɂ
܂BgpĂȂΐgȂAzKv͂܂
܂B̃WbNɂΐԈႢȂ}āAft
łB 

 

2.4.1. z[E

        " dbǂʂ̔ΑɂȂA}CNtB^         
        gĂȂł傤BXvb^B̎iłB         
        "                                                              
                                                                       
                         --BellSouth  ADSL ̐ݒu(Pލς݁H)        

DSL fzœKȕ@"z[E(homerun)" ƌĂԂƂ
܂BǂĂĂ΂Ă邩ƂƁA1 {̒ZXg[gEP[
uXvb^烂f DSL WbNɒ邩łB邱
ƂŁȂzʂ炸ɍς݁AɂĂ\POTS Wb
N̂ǂHĂƂ\ł邩܂Bž
ׂ́ADSL ̐M܂B 

܂邱ƂŁAgWQ(RFIBRadio Frequency Interference)ɂ
Q܂BoĤǂ RFI Ă DSL ɂƂĂ͒vI
łB[^[gXAduAPx̏ƖA@P[
u𗣂ĔzĂBꂪȕ@łB܂Ƀ}CNtB
^ďQNƂ܂\ӏ̂ł͂Ȃ
A1 ӏȂP[XłB܂JeS 5 ̂悤ɃO[h̍
P[ug悤ɂĂB 

݂̂̂"Xvb^"(܂}CNtB^𕡐g) ꍇ́A
z[EֈڍŝɃXvb^w𓾂ȂȂ܂B
񂻂ɂ͔zVKɂKvł傤B܂}CNtB^
LL΂܂BP[Xɂ܂AXvb^ 700 tB
[gقǂɂȂ܂Ĩ}CNtB^ݒuĂAx⋗
Eɋ߂ȂAtB^O΂ȂP邩܂B 

オȃXvb^ɂ́ANID Ƀ}CNtB^gĂ܂
̂܂B"{iI"ł͂܂񂪁AĂ͂܂悤
łB

 

2.5. zƃXvb^

Xvb^̏ꍇ(Ƃ"}CNtB^"p)p̏ꍇ́A
̕΂ĂB 

Xvb^͕ 2 ɕ܂B̓Xvb^gƉOɐݒu
鏬➑̂łBNetwork Interface Device (NID)(SNI  ONI ƂĂ)
ꏊɓdbЂw肵PʂƂɃXvb^ƂƂ➑̂t܂
Bʏ͉O̓dbƂɎt܂BNID ̂΂ɕtĂ
BdbЂXvb^̃eiXł悤ɂKv
ŁAƂ̊OłƂɂł傤BKO
Kv͂܂B 

́AȂƂ 2 {̓Ɨΐł͂łBXvb^ɂ͂
 1 ΕKvŁA 2 {̒Pɑ΂ĐM𕪗܂B̓ 1 
ׂ͂Ă POTS WbNɁAc DSL f̃WbNɂȂ܂B
dbЂ̉Xvb^ LINE ɐڑĂB̐
db VOICE ɁAf DATA ɐڑĂB 

`FbN|CgB̒iKŃXvb^̉_CĂ
͂łBȂĂȂ΁AԈĔzĂ܂ƂɂȂ܂
B܂f NID ̃eXgpWbNɑ}Ƃ\ł(ׂ
)Bf̓dR[h}ĂBĂ΁A
Ȃ""͂łB̃eXgɂ̓fKvłB
( USB ^Cṽf͓sOɃhCo[hĂ
Kv܂B̓Rs[^ꏊɂƂƂӖ
܂)B 

 

2.6. DSL WbNz

DSL ̑WbNRs[^̏ꏊɔz܂傤BłɃXvb
^ DATA ɂ͐ڑς܂Ă͂łBׂƂ͂ꂼ̏
ɂĈႢ܂AʓIɂ 1 ΂̐ DSL WbNɐڑĂ
̂ł͂Ȃł傤BڑmFĂBDSL 
RJ11 Ԃ̔źAdb DSL WbNƂ͈قȂ邩ȂłB
ā\fɂĐM΂قȂ܂\قƂǂ͓̂̂̑
łAɂ͊Ȏ΂ĝ܂B 

} 3: RJ11 ̔z

 
    ||
    ||
    ||
   /  \
  |RJ11|   
  |    |  
   ----
   ||||
    ^^  <--     قƂǂ̃f͓̑΂g
   ^  ^ <-- O    ɂ͊Ogp̂BƂ
 Alcatel 1000  
                  SpeedTouch Home

   

 

2.7. }CNtB^̐ݒu

͂ƂĂȒPłB"Xvb^"^CvݒuȂAxꂽ
}CNtB^dbWbNׂĂɎtĂBADSL
fȂĂƂ͏܂B FAX @AiOf̂悤
ȃfoCXYȂBtB^ DSL ggJbgAPOTS @
킪 DSL ̃mCYƊȂ悤ɂ܂B 

ӁI炩̌xVXegĂꍇA}CNtB^͎gȂ
łBxVXe͗lXȖN\Ax
^Cvǂ̂悤ȐݒĂ邩ɂĈقȂ܂B̃P[X̓Xv
b^̎gp𐄏܂B

 

2.8. C[TlbgEf̐ݒ

ݒ肷鎞̓f(܂̓[^[)̓dR[hȂŁADSL ̑W
bNƃfԂdbŌт܂B̃P[u͎x܂B
ȂAʂ̓dbŏ[łBC[Tlbg̃C^tF[X
fȂAC[TlbgEP[u NIC ƃfԂт܂ (
_ŃC[TlbgEf̓KmFKv͂܂)B 

`FbN|Cgł́AfdbЂ DSLAM ̐MƓ邱
mF܂BĂf͗ΐF LED AMǍDȎɓ_
܂BԂ̓IWF̏ꍇ͓Ă܂Bf̃}jA
ɂ LED ɂĂɏڂƎv܂BȂΔz
`FbNāADSL ̐M͂Ă邩ǂmFĂBM
mFɂ́AdbЂɓdbāAT[rX͂܂Ă邩Ă
B NID(LQ)ɂeXgpWbNɃf}ăe
XgĂBɃ_CĂĂA DSL ̐M
Ă邱Ƃ̊mFɂ͂Ȃ܂Btlł\_C DSL M
ADSL MāA_CƂƂ͏[N肦
Bݒu⓮삪ȂAɂ͋dmCY͏oȂ͂łB 

 

2.8.1. C[TlbgElbg[NEJ[h(NIC)̑

OłC[TlbgEfɂ̓C[TlbgElbg[NEJ[
hKvłB܂ĂȂȂALinux }V NIC āAJ[l
č\zAW[[h铙ĂBɂ͂ꂪ傫
Y݂̎ɂȂ܂\ NIC Fē삳邱ƂBLinux ɂ͎Ql
񂠂܂̂ŌĂBƂ Ethernet HOWTO <http://
www.linuxdoc.org/HOWTO/Ethernet-HOWTO.html> ɂ͍Xɏڂ񂪍ڂ
܂BL̃guV[eBOEZNV킹ČĂ
Bł NIC ĂȂAƈӊOɑ邩
B 

NIC ƃfԂ RJ45 P[ugĐڑĂ邱ƂmFĂ
BP[u"dꂽ܂ܔ}"ł܂B܂肱̂߂ɓd
𗎂ƂKv͂܂B 

 NIC mɓĂ邩ǂɃeXgł܂B܂C^
tF[XAbvĂ݂܂傤Bping łČĂƔ邩
Ă݂܂傤BŌ ifconfig ŃG[`FbNĂ݂܂傤B


# ifconfig eth0 10.0.0.1 up                                         
                                                                    
                                                                    
$ ping -c 50 10.0.0.1                                               
PING 10.0.0.1 (10.0.0.1) from 10.0.0.1: 56(84) bytes of data.       
64 bytes from 10.0.0.1: icmp_seq=0 ttl=255 time=0.2 ms              
64 bytes from 10.0.0.1: icmp_seq=1 ttl=255 time=0.2 ms              
64 bytes from 10.0.0.1: icmp_seq=2 ttl=255 time=0.1 ms              
<snip>                                                              
                                                                    
- 10.0.0.1 ping statistics -                                        
50 packets transmitted, 50 packets received, 0% packet loss         
round-trip min/avg/max = 0.1/0.1/0.2 ms                             
                                                                    
                                                                    
$ ifconfig eth0                                                     
eth0    Link encap:Ethernet  HWaddr 00:50:04:C2:09:AC               
        inet addr:10.0.0.1  Bcast:10.255.255.255  Mask:255.0.0.0    
        UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          
        RX packets:428 errors:0 dropped:0 overruns:0 frame:0        
        TX packets:421 errors:0 dropped:0 overruns:0 carrier:0      
        collisions:0 txqueuelen:100                                 
        Interrupt:10 Base address:0xc800                            


"eth0" G[ɗオ΁Aping łĂG[͏oȂ͂
Bifconfig G[oĂȂ΁An[hEFA͋炭dl
ɂׂēĂ܂B܂ł Linux ݒ肵͂߂Ԃɂ܂ł
BłȂΉL̃guV[eBOEZNVĂ
B 

mĂ: f̒ɂ͂ł 10baseT NX̏ԂɔzĂ
̂܂B͒ڃJeS 5 P[u NIC ɐڑANXE
P[u͎gp܂B͂ꂪ킩܂ 12 ԋ߂Ԃ𖳑ʂ
܂BԈႢȂ悤Ɂ\܂}jAƓǂ݂܂
B

 

2.9. USB f̐ݒu

USB f̐ݒúAC[TlbgEf̏ꍇƂقƂǈႢ͂܂
BC[TlbgEJ[hȂȂłBdb DSL ̑W
bNƃf DSL |[g̊ԂɐڑĂB USB P[u
Rs[^ USB |[gɎtĂB

USB fƓē삷ɂ́Ax_[₻̃fƂɐ
p̃hCoKvɂȂ܂BAlcatel  SpeedTouch USB gĂ
肷ƁAhCo Alcatel ̃hCõz[Ey[W(http://
www.alcatel.com/consumer/dsl/supuser.htm#driver) 痎Ƃ܂B̃h
Co̓J[lEW[ŁAoCiƃ\[XpӂĂ܂
B̃hCoɂ̓J[l 2.4.1 ȏオȂƂKvƂȂ܂BKv
@\𐶂ɂ́Aɒǉ̃\tgEFAƃJ[lEpb`CXg
[Ȃ΂Ȃ܂BhCoɂ͊ȒPȐĂ܂BR[h
̑啔͂܂iKŁAɈ肵ĂƂ͌Ȃ悤łBS
pł͂܂I

̃hCo PPPoE  PPPoA ƂT|[gĂ܂Aꂼꂪ
삷Xebv͂܂قȂ܂BXebvEoCEXebvŐ
Ăt^ĂB

 

3. Linux ̐ݒ

fڑēꂽȂALinux ݒ肵 ISP ֐ڑƂ
܂ŗƂɂȂ܂BLinux VXeɏo܂Af
10baseT Őڑ^Cv̂̂ȂAԂ񉽂łڑłł傤B
[^[nuAXCb`OEnuAPC ȂǂȂǂ]݂̃VXeB
́AR Linux ƂʂグĂ܂B 


                              Warning                               

ISP ɐڑOɁAZLeB֘AׂĊɗĂ
BDSL oRŃC^[lbgɒڐڑۂɕKvɂȂ܂BISP Ʉ
܂AÕ[ÛقƂǂ͂Ȃ̃VXeɃANZXł
܂B炩̃tBA[EH[ݒuāA|[gT[rX𗎂ƂA
Ƃǂ痈悤ƂAȂ̃}VɐڑOɃpX[h
悤ɂׂłBL̃ZLeBEZNVĂB
܂ANEZNVɂ́AZLeBɂĂɂƂĂdvȄ
gsbNĂ܂B̍ՂɂȂȂ悤ɁAOɏĂ
I                                                              

 

3.1. ubW vs PPPoX lbg[N

ƂƂݒuƃVXeݒ̍ŏIiKɗ܂BDSL Ή̗lX ISP 
ǂ̂悤Ƀlbg[N\zĂ邩Ă܂傤BISP ǂ̂悤
ɍ\zĂ̂mĂ̂́AƂĂ؂ȂƂłBƂ̂́A
ꂼ̃P[XŗlXȕ@ƃXebv݂邩łBɏ
邱Ƃ ISP \ĂeƂ͌܂B܂ Windows g
Ȃ̂ŁAISP xZbgAbvfBXN͖ɗȂł傤B
ƎvȂAISP ̃eNjJT|[g⑼̃[UɕĂ݂Ă
B 

ɂƂɁAISP ̒ɂ͕̃T[rX(lXȑxv
)񋟂Ƃ܂BƂ΁AVerizon( Bell Atlantic)
́AƂƌŒ IP ubWڑŒ񋟂Ă܂Bׂ͂
PPPoE œI IP 񋟂悤ɂȂĂ܂BݒuAݒʂ炷
͂܂ʕłB 

DSL lbg[N 2 {́AubW DHCP ̑gݍ킹 PPPoX ł
Bǂ݂̂ IP AhX擾ƃlbg[NݒɊ֘Aׂ
@\܂̂ŁA̓_SzKv͂Ȃ͂łBɐSz
܂B͕ʂ͋CɂȂڑiɂĂłBKvȂ
́AK؂ȃNCAgAׂƂāAڑς܂A
삳邱ƂłBʎɂĂ͂̌ɋc_܂B

dvI܂ ISP lbg[NɐڑݒĂ邩mF邱Ƃ
KvłBJԂ܂Ap\ȎȐڑ@́AubW DHCP 
gݍ킹 PPPoE łB݂͑ɑłȂ݂ɂȂĂ
B܂ۂɂ͑̑I݂܂Bł玖Oɂ݂̂
邩𐳊mɗĂKv܂B͐U@ɑȂ炸A
ȂΖʂȎԂƘJ͂₷͂߂ɂȂ邩܂BiɑI
̗]n͂܂BISP lbg[Nǂ̂悤ɍ\zĂ邩Ɉˑ
Ă邩łBPPPoE ̓ubWꂽlbg[Nł삵܂B
AŃubWĂ̂AĂȂ̂mĂ܂
Ƃ͂܂BvoC_[^[񋟂ĂȂA`Xł
B̃[^[Ŏ̃t@CA[EH[\zł邩܂B 

č Baby Bell(Regional Bell Operating Company ̕ʖ)̂ǂƌ_
ȂA炭 PPPoE 𗘗p邱ƂɂȂł傤B܂肻 PPPoE
NCAgKvɂȂ邱ƂӖĂ܂B

̃voC_ŗL FAQ  HOWTO ́AL̃NWEZNV
ɂ܂B

 

3.1.1. ubW DHCP ̑gݍ킹

1A2 NOƂÂǂł́AP"ubW"ڑʓIłB
PPPoE ͂܂łĂ܂łB̃^Cṽlbg[N͂
 LAN ̃Tulbg̒ɂ`ɂȂ܂B[JȃTulbg̑
̃gtBbNAƂ ARP u[hLXgɂ炳ꂳ܂BF؂
sT^IȎiƂāADHCP oRĂ܂B

DHCP ͕Wς݂̒]̂lbg[NvgRŁAIP AhXl
bg[NɕKvȂ̑̃p^(Ƃ΁Al[T[o)擾܂
B͕WA˂Ă]ǂlbg[N݂̂ŁA[U
͂ƂĂȒPɃZbgAbvł܂B܂ƂĂ肵Đڑł܂B
f𔲂Ă 10 Ă}Ă݂ƁAĂѓ͂߁Aڑ
ێ܂\ IP AhXɂȂ܂B 

 

3.1.2. PPPoX

ݎ嗬ƂȂĂ̂ PPPoX ŁA PPPoE(PPP over Ethernet)
PPPoA (PPP over ATM)w܂Bނł邱̃vgR͍L
܂B PPPoE 嗬ƂȂł傤B PPPoX ͊ƐV
ZpŁA̖̕\ʂAPoint-to-Point Protocol ̈ŁADSL lb
g[ÑvgRłB

Linux p PPPoE NCAg͂܂(LQ)BPPPoX ͋^
IɃ_C⃋Abv^Cv̊܂B[U̓[U ID ƃpX
[hgĔF؂܂B̔F؂ɂ RADIUS T[o𗘗pĂA܂
ɌÂǂ_CAbv PPP Ɠ݂gĂ܂B IP AhX
̑֘ȀNCAgɕԂ܂B_CƂ
͕Kv܂Bǂ̂悤ȃJjYŎsĂ邩ɂẮAN
CAgƂɈႢ܂̂ŁA}jAǂǂނ̂ԂłBʂ
pap-secrets ̂悤Ȑݒ邱ƂɂȂ܂By󒐁F RADIUS
̏ڍׂ́ARFC2868 <ftp://ftp.isi.edu/in-notes/rfc2868.txt> 
z

PPPoE  USB ̂悤ȃC[TlbgȊÕfoCXœƂĂӖ
ł傤BhCoCXg[ĂĂłB

ISP 炷ƁAPPP ͂ƂĂȒPɃeiXQ\Ȃ
݂łB[U炷ƁAPPP ̕ݒɗ]vɎԂACPU
gAڑubW^CvƔrĈ肵ĂȂ悤łB̂悤
Ȃ킯łAsɂȂĂĂ悤łBȆK͂ȓdb
̑AƂ킯č RBOC(Regional Bell Operating Company ̗́B
Baby Bell Ƃ)́APPPoX ɑSʓIɍ̗pĂ܂BPPPoX Őڑ
ݒ́AubW DHCP ̑gݍ킹̐ݒƂ͎Ă܂B

 

3.1.3. ATM

DSLAM 烂f܂ł̉̃gtBbN𕁒ʂ ATM ɏ悹Ă
ŁAATM ɂ̂܂ܐڑłΈӖ悤Ɏv܂B\ł͂
̂łAɂ܂ȃP[XłBčSy ATM ĂƂĂ
Afɒǉ Efficient Networks 3010 ̂悤 PCI  ATM J[ht
Ȃ΂܂BLinux  ATM vWFNgĂāA
J[l 2.4 ɑgݍݍŒł(ڍׂ̓NWZNVĂ)
B

̂s\ȎiƂȂł傤A܂"܂" sĂ܂B

 

3.2. WAN C^tF[X̐ݒ

DSL fōłʓIȐݒ"ubW"[hłB PPPoX  DHCP ł
̐ݒ肪KvɂȂ܂B̂ƁA NIC  WAN ̃C^tF
[XɂȂ܂B̕ŊO̐EƃVXeȂĂ܂([^
[ĂȂ牺L̃[^[ŗL̐Ă)BNIC ̐ݒ
Ēʂ܂BẮA"eth0" C[Tlbg̃C^tF[Xɂ
Ă܂B

PPPoX ̏ꍇAڑm "ppp0" ͂ƎC^
tF[X܂B̓_CAbv̏ꍇƂ܂ɓłB
PPP T[o WAN ̃C^tF[XƂ̐ڑm܂B̌
 "eth0" Ɋ֘Aݒ邱ƂɂȂ܂B 

ISP  IP ڑݒ肷@͗lXłB

 E Œ IP 蓖Ă
   
 E ubW^Cṽlbg[N DHCP ɂ铮I IP 蓖Ă
   
 E PPPoX ɂ铮I IP 蓖Ă
   
 E PPPoX ɂŒ IP 蓖Ă
   
XɌčs܂傤B

 

3.2.1. Œ IP ̐ݒ

"Œ" IP AhX́AAhX̕ύXȂƂۏ؂Ă܂B
hC𗧂ĂAJT[o^p肵ꍇɓsǂ@
BAISP ׂĂɂėpł킯ł͂܂BŒ IP A
hXɂ͍ۗ_܂AAhX݂̑"B"邱Ƃ
ɓȂƂ_܂Bӂ̈ӂ̍UgB
Ƃ͍łBŒ IP AhXĂȂA[^[
ĂāÃ[^[ɌŒ IP UĂ肷ȂÃZNV
͔΂ĂB 

ISP w肳ꂽ IP AhXTulbg}XNAftHgEQ[gE
FCA DNS T[oȂǂ̏ݒ肵ĂBLinux fBXgr[V
 (RedhatADebianASlackwareASuSE )ɂ́Aꂼ̐ݒ@
܂̂ŁAg̃fBXgr[ṼhLg`FbNĂ
BꂼƎ̃c[܂BƂ Redhat  netcfg 
Ă܂B ifconfig  route R}hgă}jAł
\łBNet HOWTO <http://www.linuxdoc.org/HOWTO/Net-HOWTO> ΂
ɏڂ񂪂܂BR}hCgāA IP g
܂B 


 # ifconfig eth0 111.222.333.444 up netmask 255.255.255.0           
 # route add default gw 111.222.333.1 dev eth0                      
                                                                    


l[T[oK /etc/resolv.conf ɒǉĂB

 

3.2.2. ubW DHCP gݍ킹ꍇ̐ݒ

ubWlbg[Ng ISP ́A DHCP g IP AhX
ƔF؂[Uɒ񋟂Ă܂BfBXgr[VׂĂɂ́A
Ƃ 1  DHCP NCAgĂ܂BłʓIȂ̂ dhcpcd 
̂悤łB pump  Redhat x[X̃fBXgr[VɂĂ
B Redhat 6.0 _ł̘błBDHCP NCAg ISP ̃T[o
 IP ƂɊ֘AłQ[gEFCEAhX DNS T[oA
lbg[NE}XN"؂"܂BISP ̐ݒɂāAI
"XV"܂B

DHCP NCAgu[gɋNȂAfBXgr[Vp
ӂĂ@gĂB DHCP ɂĂ͂قƂǐݒ肷邱
Ƃ͂܂BƂ̂ȒPɎgpł邩łB"eth0" ȊO NIC
蓖ĂĂȂAǂ̃C^tF[Xĝw肷Kv
ł傤BR}hCw肷邱Ƃ\łBڂ͂
ꂼ man ĂB

Œ IP łȂȂAISP ͂Ȃ炩̕@ŐڑĂ肪NȂ̂
mKv܂BDHCP gF؃vZXɂ 2 ̕@܂
B܂łʓIȕ@́Albg[NfoCX MAC(n[hEFA)A
hXĝłBʂ NIC ̃AhXɂȂ܂BMAC AhX
͈ӂɌ܂lŁAu[g̃bZ[W̒Ɍ܂B܂ ifconfig
gāA00:50:04:C2:19:BC ̂悤ȕ\Ō܂B͂߂Đڑ
ɂ́AISP  MAC AhXm点Ȃ΂Ȃ܂B

 1  DHCP ɂFؕ@́AzXg̊蓖Ăgčs܂B
̏ꍇAISP ̓zXg̏`Ă܂BڑɓāADHCP
NCAg̓T[oɑ΂Ă̏nȂ΂܂B dhcpcd
 pump ǂƂ "-h " ƂR}hC̃IvVł̋@\
Ă܂Bڍׂ́ANCAg man fBXgr[Vɂ
ĂhLgĂB 

    : ISP  MAC AhXɂF؂ĂāAlbg[NfoCX
    (Ƃ NIC) ύXꍇ́AVAhX ISP ɓo^Ă
    BȂƐڑłȂȂĂ܂܂B
   
 

3.2.3. PPPoE ̐ݒ

PPPoE(PPP over Ethernet)́AISP ڑ𐧌䂷 1 ̕@ŁAISP
ƊEł͈ʓIɂȂ܂BĽŒ IP  DHCP Ɛݒ@S
قȂAԂX܂Bŋ߂̃fBXgr[Ṽ[X
ɂ́APPPoE NCAgtĂ܂BtĂȂȂA_E
[hȂ΂ȂȂł傤Bhttp://freshmeat.net ̂悤 Linux
̃A[JCuTCg`FbNČ邩ALĂB  

GPL  PPPoE NCAgpł܂B

 E The Roaring Penguin (rp-pppoe): http://www.roaringpenguin.com/pppoe
    /  David F. Skoll ɂ̂łBƂĂȒPɐݒ肪ł悤
    ł̂ŁA܂ꂩ͂߂Ă݂ĂB Linux  PPPoE
    ƂāAɕ]̗ǂNCAgłBŔAȒPɃCXg[
    ł_ƁA󂢂̃fBXgr[VɃohĂ
    邱ƂłBrp-pppoe ̓[U[hœNCAgŁAJ[l
    2.0  2.2 œ삵܂BJ[l 2.4 ł̓J[l[hœ삵
    B
   
 E PPPoEd: http://www.davin.ottawa.on.ca/pppoe/ <http://
    www.davin.ottawa.on.ca/pppoe/>  Jamal Hadi Salim ɂ̂ł
    BlĈ 1  Linux NCAgŁA̃fBXg
    r[VɃohĂ܂BJ[l 2.2 ŃJ[l[h
    ɂȂĂ܂BݒXNvgĂ̂ŁApb`͓
    ĂKv܂BăCXg[AȒPłB܂
    A rp-pppoe(J[l 2.0  2.2 kernels)̂悤ȃ[UԂ
    ̂ɔׂ CPU g܂B
   
 E PPPoE Redirector: http://www.ecf.toronto.edu/~stras/pppoe.html
    <http://www.ecf.toronto.edu/~stras/pppoe.html>B pppd-2.3.7
    ȍ~̃o[WgāAPPPoE 𗘗pł悤ɂ郊_CN^
    łBȊÕVXe\ăRpCKv͂܂BJ
    [l 2.4 J[l PPPoE  PPPoA T|[g܂ł̂
    Ȃł(󊈔ɊJiłƂ͌Ȃ悤ł)B
   
 E J[l 2.4  PPPoE T|[g܂B2.4 p PPPoE  http://
    www.shoshin.uwaterloo.ca/~mostrows <http://www.shoshin.uwaterloo.ca
    /~mostrows/> ɂ܂BMichal Ostrowski J[lx
    PPPoẼei[łB
   
 E EnterNet  NTS(http://www.nts.com J PPPoE NCAg
    AGPL ł͂܂BISP ̒ɂ Linux NCAgƂĔzz
    Ƃ܂B\[XR[htĂ܂ARɃ_E
    [h͂ł܂(EnterNet ɂĂ͒N𓾂܂ł
    )B
   
ǂ̃NCAgI񂾂ɂāA INSTALL ̐Ƃ̑pbP[
WɂhLg(README  FAQ )Ă܂B 

PPPoE NCAgňxڑ΁AL̗(Roaring Penguin ̏o͗)
悤ȏԂɂȂ͂łB̗ł "eth0" ɃfڑĂ܂
B


$ route -n                                                                
                                                                          
Kernel IP routing table                                                   
Destination    Gateway      Genmask         Flags Metric Ref Use Iface    
192.168.0.254  *            255.255.255.255 UH    0      0     0 eth1     
208.61.124.1   *            255.255.255.255 UH    0      0     0 ppp0     
192.168.0.0    *            255.255.255.0   U     0      0     0 eth1     
127.0.0.0      *            255.0.0.0       U     0      0     0 lo       
default        208.61.124.1 0.0.0.0         UG    0      0     0 ppp0     
                                                                          
                                                                          
$ ifconfig                                                                
                                                                          
eth0    Link encap:Ethernet  HWaddr 00:A0:CC:33:74:EB                     
        UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1                
        RX packets:297581 errors:0 dropped:0 overruns:0 frame:0           
        TX packets:266104 errors:1 dropped:0 overruns:0 carrier:2         
        collisions:79 txqueuelen:100                                      
        Interrupt:10 Base address:0x1300                                  
                                                                          
eth1    Link encap:Ethernet  HWaddr 00:A0:CC:33:8E:84                     
        inet addr:192.168.0.254  Bcast:192.168.0.255  Mask:255.255.255.0  
        UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1                
        RX packets:608075 errors:0 dropped:0 overruns:0 frame:0           
        TX packets:578065 errors:0 dropped:0 overruns:0 carrier:0         
        collisions:105408 txqueuelen:100                                  
        Interrupt:9 Base address:0x1200                                   
                                                                          
lo      Link encap:Local Loopback                                         
        inet addr:127.0.0.1  Mask:255.0.0.0                               
        UP LOOPBACK RUNNING  MTU:3924  Metric:1                           
        RX packets:1855 errors:0 dropped:0 overruns:0 frame:0             
        TX packets:1855 errors:0 dropped:0 overruns:0 carrier:0           
        collisions:0 txqueuelen:0                                         
                                                                          
ppp0    Link encap:Point-to-Point Protocol                                
        inet addr:208.61.124.28  P-t-P:208.61.124.1  Mask:255.255.255.255 
        UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1        
        RX packets:297579 errors:0 dropped:0 overruns:0 frame:0           
        TX packets:266102 errors:0 dropped:0 overruns:0 carrier:0         
        collisions:0 txqueuelen:10                                        


   
    : PPPoE ̓C[TlbgEt[ɗ]vȃI[o[wbh𑽏
    Ă܂܂B ppp0 C^tF[X MTU ́Amɂ
    1492 ƂݒɂȂ܂B MTU 傫ƁAWeb y[W{
    悤ƂɁAȂTCgoĂ邩܂B܂
    ɂ肪āAƂɂȂ邩܂B܂ LAN 
    }XJ[hĂC^tF[X MTU  1452 ɐݒ肷Kv
    邩܂B̌ PPPoA ubW̐ݒɂ͓Ă͂܂
    ܂BΏۂ PPPoE łI
   
̂Ƃ PPPoE ̐ݒɂƂėvƂȂ̂́A[JƐڑ鑊葤
ԂɂC^tF[Xʏ菭ȂƂ 8 oCgKv
Ƃ_łBʁA[^[ׂ͂ 1500 ɐݒ肵Ă܂Bł
1492 ƂĺA[JƂĂ͐lłBAƂ
Əl̐ݒĂ郋[^[邩܂Bꂪ Web y
[W{ÃgtBbN̖N\܂
B̖eXgɂ́AMTU ̑傫܂삷܂ŏ
B

 

3.2.4. PPPoA

PPPoA(PPP over ATM)́APPPoE ꂽ@łBn[hEFA
ƂǏĂ܂łB܂ DSL ̃gtBbN ATM ɏ_
Dꂽ_łBPPPoE ̂悤ɐڑۂɃ[UԂœNCAg
KvƂ܂B܂C[Tlbgwɂɗ]vȃvgRǉ
Kv܂BF؂͓݂łB[U ID ƃpX[hg
Đڑ܂BC[TlbgŃJvZ͍sȂ_قȂ
B 

PPPoA ́An[hEFAłׂĂ̏邩AʂȃhCofo
CXɎ邩ǂ炩Ŏ܂BPPPoE ̂悤ȃNCAgE\t
gEFA PPPoA ɂ݂͑܂BATM p̃pb`́AJ[l 2.2A2.4
pɗpӂĂ܂B܂ Efficient Networks 3010 ̂悤 ATM J[h
x[XƂvWFNgĂ܂BLinux  ATM g߂
z[Ey[W http://lrcwww.epfl.ch/linux-atm/ <http://
lrcwww.epfl.ch/linux-atm/> łB܂ɏ񂪗~ȂA http://
www.sfgoth.com/~mitch/linux/atm/pppoatm/ <http://www.sfgoth.com/~mitch/
linux/atm/pppoatm/> Ƃz[Ey[W܂B͂̃vWF
NgŃJ[l֌W̊JẴTCgłB PPPoA ̎́A
n[hEFA̓hCox[XɂĂ܂B Linux p PPPoA 
f̃hCo͌ł͂قƂǂ܂BL̃f́Aʂ̏
ł͗ʂĂȂ悤łBISP ꂾT|[gĂƂȂ
AƂɂȂł傤BPPPoA p\ȊOtf͗pł
B 

PPPoA  ISP ̗B̃IvVȂAPPPoA ڑł郋[^⃂f
ł傤B΃n[hEFAׂĂJo[Ă
܂B

 

3.2.5. Alcatel C[TlbgEfg PPTP  PPPoA ̑gݍ킹

Alcatel SpeedTouch Home C[TlbgEf(Alcatel 1000 ̌p@)̓u
bW PPPoA ̗ڑ@ɑΉĂ܂Bf̂ŁAPPPoA vg
RT|[gĂ܂BPPTP  PPPoA ̑gݍ킹̏ꍇ(RFC1483 ɒ
`ĂubW@\ł͂Ȃ)́ALinux  PPTP(}CN\tg VPN)
oRŃfɐڑ܂BLinux p PPTP̃z[Ey[ẂAhttp://
cag.lcs.mit.edu/~cananian/Projects/PPTP/ g΁AKɓ삵܂B
PPTP ̃CXg[ɉāAJ[l PPP T|[gĂȂ΂
܂B

̃f͓ɐݒ̂߂̃z[Ey[WĂAuEUg
Đݒł܂BftHgł http://10.0.0.138 ƂAhXɂȂ
Ă܂( NIC ̃AhX 10.0.0.1 Ƃ悤 10.0.0.0 ̃l
bg[NAhXɐݒ肷Kv܂B̓f̐ݒpz[
Ey[WɃANZX邽߂ł)BPPPoA Őڑɂ PPTP `Őڑ
܂BftHgœȂ΁AvoC_܂ʂ̐ݒ𗎂Ƃ
Ă邱ƂɂȂ邩܂BuVPI/VCIvuJvZv̐ݒ́Av
oC_ɂėlXłBނ񃂃fvoC_͂̂ȂA
ׂĐݒ肪IĂ͂łBy󒐁FVCI(Virtual Channel
Identifier)́AATM Ŏgp鉼z`lʂԍłBVPI
(Virtual Path Identifier)́AATM Ŏgp鉼zpX(oH)ʂ
łBÂ ATM Z̃wb_Ɋ܂܂ĂA VCI  16 rbgAVPI
 8 rbgłBz

̃Xebv pptp ̐ݒłB pppd ̐ݒt@Cł /etc/
ppp/pap-secrets ( chap-secrets)  /etc/ppp/options ݒɎg
܂B̃t@CɃ[UƃpX[hݒ肵ĂBL
ɂȂ܂B 

 /etc/ppp/pap-secrets:

# client secret server IP address 
login@isp.com  *    my_password_here    *

   

 /etc/ppp/options ɂ͉L̂悤ɐݒ肵܂B

 
name "login@isp.com"
noauth
noipdefault
defaultroute

   

ׂĐmɐݒ肵ȂA̓f̃AhXw肵āAPPTP N
邾łB


 #pptp 10.0.0.138                                                   


   
    : Alcatel ͂̃f̌^ԈႢ𐔑̔Ă܂Bׂ
    ̃fł̋@\͗płȂ܂B܂ftHg̐
    肪Ă邩܂BẪfwꍇɂ́A
    ĂB
   
    ̃f́APPTP 𓯎 1 ڑ܂łT|[gĂ܂B
   
 

3.2.6. fgݍ݃[^[̐ݒ

ISP ̒ɂ"[^["ڑfoCXƂĒ񋟂Ƃ낪܂B
ʂ̓f^[^[łB܂C[Tlbgx[X̃foCX
Ă܂BLinux ɂƂĂ͔ɓsǂ\łB͂肱̃P
[XłA삷̂ɍł؂Ȃ̂͌݊̂ NIC łB 

"[^["ɂ͂̒܂BDꂽ_ƂāAڑǗ IP
̃JvZAF؂܂BɊÕgtBbN LAN 𕪗
܂B̑ɂFX܂BȒPɌ΂ׂĂ\łBISP
ڑɕKvȃvgRɉw肵ĂĂAׂĂɑΉł_͍
łB 

ISP  PPPoX KvƂĂȂA͊ył܂Blbg[N
p̂ɁAǉŉ̃\tgEFACXg[Eݒ肷KvȂ
łBf̃t@[EFAőΉ邩łB}CiXʂ
܂B Linux [^[ƂĎgꍇ⑼̃\tgEFAIȑΉ
ƔrāA_킹ĂȂ̂قƂǂłB
A[^[̔w Linux [^[ƂĐݒu΁Aǂ̃lbg
[NɂƂĂō̊ƂȂ܂B 

[^[ݒuƂ̓fƔɎĂ܂(LQ)A[^[
̐ݒ莩͈̂قȂĂ܂B1 "zbv"ڂ̓[^[̃C^tF[XŁA
ISP ̃Q|gEFCł͂܂B[^[ 2 ̃C^tF[X
Ă܂B1 ͂Ȃ̃}VȂĂ LAN A 1  ISP
ȂĂ WAN łBOɂ炳ĂƂ̓[^[ WAN
̃C^tF[XɂȂ܂B 

[^[ɂ͎OɃvCx[g IP AhXݒ肵Ă܂̂ŁALAN
͐ڑłł傤BꂪQ[gEFCɂȂ܂BJ IP
AhX́AWAN ̃C^tF[XɊ蓖Ă܂Bʏ킱̃foCX
́ALAN  DHCP T[oƂĂ@\Ă܂BāADHCP NC
Ag dhcpcd  pump (Redhat x[X̃fBXgr[V
ꍇ)ƂċNȂ΂܂B܂f⃋[^[̓m
ĂBԈႢȂݒ肷ɂ́A[U[YE}jAvoC_
̏mFKv܂B 

PPPoX gĂāAŐGĂڑ@\[^[T|[gĂ
ȂA[U[ ID ƃpX[h͏ȂƂڑOɐݒ肵ĂB
ubW DHCP ̑gݍ킹ȂA[^[ DHCP @\NāA
MAC(n[hEFÃAhX)voC_ɓo^ĂB[^[̒
ɂ "MAC AhX̕@\"g NIC  MAC AhX`̂
܂BŒ IP łlɐݒ肵ĂB 

[^[ɒڃANZXKv΁A[J[ݒ肵ftHg
IP AhXmĂȂ΂܂B}jA邩AvoC_
ɖ₢킹ĂBNIC ̃C^tF[Xɂ̓[^[Ɠlbg
[NEAhX蓖ĂKv܂BƂ΁A[^[ 10.0.0.1
Ƃ IP AhXɐݒ肵ĂȂAC^tF[Xɂ 10.0.0.2(
 eth0)ݒ肵ĂBlbg}XŃA255.0.0.0 łB 


 # ifconfig eth0 10.0.0.2 up netmask 255.0.0.0                      
 # route add -net 10.0.0.0                                          
 $ ping 10.0.0.1                                                    


ׂďɂȂA[^[ ping ɉ͂łB̂
ƂłA̐ݒ@̓fBXgr[VƂɈقȂ܂B
āAfBXgr[Vɕt̃hLg`FbNĂ
BŃf⃋[^[ ping ł悤ɂȂĂ͂łB
܂sȂɐiłBtelnet  Web uEUgĂ
[^[̐ݒsĂB

ISP [^[gpIvV񋟂ĂȂƂĂAT[h
p[eB[J[̃[^[܂BT[hp[eB[J[Ƃ́A
Netgear  LinksysA CiscoAZyxelACaymanAAlcatel w܂Bł
܂ŘbĂ@\ׂĂ̐iĂ邾łȂA
炭ȏ̋@\Ă܂BvoC_ DSL Ŗ{Ɏgpł邩
ǂKmFĂB[^[ PPPoX ֘A̐Sz̎
̂ɓKĂ܂B


                              Caution                               

[J[̒ɂ́A"t@CA[EH["s鐻iƂĂʒu
ÂĂƂ낪邩܂Bɂ͊{I NAT (Network   
Address Translation or masquerading)ȊỎłȂꍇ܂
B̓t@CA[EH[ƂătXybNłȂAt@
CA[EH[ł炠܂BwOɂ͒AǂǂŁA
{Ƀt@CAEH[Ƃċ@\̂ɏ[ǂ𗝉ĂĄ
B                                                          

 

3.3. ڑ

ŏׂ͂Đ܂BڑeXg͂܂ŗĂ܂BISP
̃Q[gEFC ping ƁÃEhgbv^C 10  75
ms ɂȂĂ͂łBƂ낪ȂڑłȂ͂
BL̃XebvAL̃guV[eBOZNV
ĂB

 

4. SȐڑ

̃ZNVł́A܂ŃC^[lbgɏ펞ڑĂȂA
ZLeBɂĊ{Iȍl܂藝ĂȂΏۂɁAZ
LeBɊ֘AڂłBȒPɌƊT𒭂߂
܂BׂĂɂĊȐ͂܂IԈ
ɐi܂Ȃ悤A^̂ɏ[ȒxłBڍׂ̓NW
TCgĂBlɃfBXgr[Vt̎ɂ[
ȏ񂪕K܂B 

 

4.1. ZLeBENCbNEX^[g

펞ڑ͂߂OɁA܂SɐڑKv݂тȂ
łBȂ́Aш Unix CN OS Ƃ 2 ̂́A܂肢
d|ANbN肷lԂFĂiD̑ΏۂL
Ă̂łBɂł͓IȉaHɂȂĂ܂̂łBNm
bNOɁAĂ܂傤BԂ񎞊Ԃ͂Ȃɂ܂
Bł͑͂߂܂傤B

 E f[T[rX̒ŁA炩ɕsKvOANZX\
    ƂȂ̂͋NȂłBN[YĂ|[gʂĂ
    d|܂Bps  netstat gāAǂȃT[rX
    Ă邩Ă(ڍׂ man Ă)Bnamed  
    sendmail AtelnetAftp𓮂ĒNANZXłKv
    H͂肵ȂȂNׂł͂܂BɕKvȃXe
    bv́A炪̃u[gɍĂыNȂƂmF邱Ƃł
    B̓_ɂĂ̓fBXgr[Vt̃}jAĂ
    B
   
    fBXgr[V̑́Ã݂T[rXftHgŋN
    ܂BĉȂẴT[rXN邩
    BۋNĂ邱ƂCȂ܂B
    ĂāAǂ̂悤ɈSɂ̂́AȂ̐ӔCȂ̂łBf
    BXgr[V"ftHg"̐ݒɗ炸Ag̈S
    ߂ɐݒ肵ĂB
   
 E T[rX̂K{̂̂łƌ߂ȂAKŐVł𓮂
    ĂB𔭌Ȃ炷ɏCāAsӑłH
    悤ɂĂB펞ڑĂ΃Abvf[g͂ƂĂȒP
    AAbvf[g͔ɑ؂łBfBXgr[VŐVpb
    P[Wp\ǂ`FbNāAǐĂBZL
    eB֘Ã[OXgȂQĂB
   
 E t@CA[EH[ݒuăANZX𐧌AO悤ɂ
    BpĂJ[l̃o[WɂĎĝقȂ
    ܂B 2.0  ipfwadm 2.2  ipchainsA 2.4  iptablesłBڍ
     HOWTO ĂB
   
 E 
      Firewall HOWTO <http://www.linuxdoc.org/HOWTO/
        Firewall-HOWTO.html> y󒐁F{́A JF <http://
        www.linux.or.jp/JF/JFdocs/Firewall-HOWTO.html> ɂ܂z
       
      Security HOWTO <http://www.linuxdoc.org/HOWTO/
        Security-HOWTO.html> y󒐁F{́A JF <http://
        www.linux.or.jp/JF/JFdocs/Security-HOWTO.html> ɂ܂z
       
      IPCHAINS HOWTO <http://www.linuxdoc.org/HOWTO/
        IPCHAINS-HOWTO.html> y󒐁F{́A JF <http://
        www.linux.or.jp/JF/JFdocs/IPCHAINS-HOWTO.html> ɂ܂z
       
      IP Masquerade HOWTO <http://www.linuxdoc.org/HOWTO/
        IP-Masquerade-HOWTO.html> y󒐁F{́A JF <http://
        www.linux.or.jp/JF/JFdocs/IP-Masquerade-HOWTO.html> ɂ܂
        z
       
    ȊO̎Ql̓NWEZNVɂ܂B
   
 E pX[h͐TdɁAɂȂ"P"gĂBVhEEp
    X[h(͐VfBXgr[Vł͕W@\ɂȂĂ
    ͂ł)gĂB[g root ŃOĈ͋֎~
    ĂBڍׂȓeƃqg Security HOWTO <http://
    www.linuxdoc.org/HOWTO/Security-HOWTO.html> ĂB
   
 E telnet ̂ ssh  OpenSSH gĂB
   
 

4.2. ǂ̃|[gǂH

ipfwadm  ipchains gt@CA[EH[̐ݒɂẮAQl
񂠂܂Bǂ̃|[g{ɊJKv̂
Ă̂͎̂̋ZłB̎ɂ蓚
ȂA"ł邾"JȂ悤ɁIłB{ 1 ́A
Ă|[goRăRs[^邱Ƃ͂łȂAł
B̃|[gŉ҂󂯂ĂȂȂÃ|[g͕܂Ă܂B
܂T[rXf[ĂȂ΁Ã|[g͕܂ĂāAA
NZX͕s\Ȃ̂łB 

Linux ł́A131,072 ̃|[g(TCP  UDP)pł܂B܂
|[g͂̃JeSɕނł܂B1 ͔ɂȂ݂̂"
"|[gƌĂA1024 菬|[głBł͌JT[rX
Ă܂B25 Ԃ SMTP  80 Ԃ HTTPA53 Ԃ named 
Y܂BLinux ł͂̃|[gU₷T[rXƂȂĂ
܂B̃|[g͊O̐ڑ󂯕tT[rX񋟂Ă܂B
telnetd f[𓮂ĂȂA23 ԃ|[gŐڑ " listen" 
܂(ۂ inetd N܂B inetd ĎĂ܂)B 

 telnet NCAggĂǂ telnet T[oɃANZX
ȂAtelnetd f[̃VXeŋNKv͂܂B
 telnet(telnetd Ƃ͕ʕ)Ƃ̃NCAgEvON
łB̂Ƃ́A ftpȂ̃T[rXɂĂ͂܂܂B
̃f[́AÕVXe玩̃VXeɐڑꍇɂKv
ƂȂ܂B

JT[rXƂȗR≽Ă邩mĂ̂łȂ
΁Â悤ȌJڑT[rXׂ͓ł͂܂BہA1024 
菬 TCP  UDP ̃|[gׂĂƂĂA炭Ȃ
Kɉ߂ƂłƎv܂B܂O֐ڑĂAȂƂ
m邱Ƃ͂܂(܂At@CA[EH[ŃubNĂ
)B̗O͂܂B

identd(113 ԃ|[g)͔rISŁAꍇɂĂ͂̂܂܂ł[ł
Bdq[ IRC T[o identd ȂƂ܂s܂B
"1024 菬|[g͊J"Ƃoɑ΂O 1 łB
Vo[Wł͂ȂSɂȂĂ܂B 

dq[ɂȂƂȂ܂BgŃ[ET[
ozXeBOĂƁAڂĂ郁[̐ڑ󂯕tĂ
łB́ASMTP(25 ԃ|[g)T[oJĂ邱ƂɂȂ邩
łB ISP  POP3 gă[ĂĂȂÃ|[g
EɌĊJĂKv͂܂B̂悤ȃ[ 25 ԃ|[g
oRĂĂ邱Ƃ͂܂BƑ傫A_Ɋ蓖Ă
ꂽ|[ggĎĂ܂B 

Bsendmail  qmailApostfix ̂悤Ƀ[JɃ[z郁
[Ef[ĂƉƕ֗ł傤BmɃftHgł͋N
悤ɐݒ肵Ă܂BO SMTP(25 ԃ|[g)t@CA[
EH[ŊJ邱Ƃŗpł̏Q邱Ƃ͉\łB܂
̕@gă[Jȃ[dĔz邱Ƃł܂B
fetchmail  procmail gݍ킹̂@ 1 łBfetchmail -m /
usr/bin/procmail -d hal łꂪłAsendmail ⑼̃[Ef[
f[E[hŎgKvȂȂ܂B̃vOŃf[
E[hɂ邱ƂȂ[𑗂邱Ƃ\łB  

BINĎÂo[Wł́AUDP  53 ԃ|[gJKv܂(TCP
̓][̓`Ɏgp)BBIND ́Al[ET[o (LbVEl[
ET[o)𓮂ꍇɂ݂̂Ɏgp܂Bɑ΂íAV
o[WɃAbvO[hāAftHgœ|[ggpȂ悤
ɂ邱ƂłB

Web T[o𗧂ĂāANĂ炭SłBUɑ΂
_̂قƂǂ́ACGI ʂĂ̂̂łBWeb T[õpbP[WAbv
f[g悤ɂĂB

A[ɗO͂܂B|[ĝ𗎂ƂAt@CA[EH
[ 1024 Ԉȉ̃|[gȊO𗎂ƂĂB

1023 Ԉȏ̃|[ǵA""|[gƌĂ΂Ă܂Bɂ̃|[
ǵAǂ̃T[oɐڑɍsɂɑ΂鉞ƂĎgp
BƂ΁Aǂ telnet Ƃ 23 ԃ|[gɐڑ܂B
ɉf[^́A_Ɋ蓖Ăꂽ 1024 ȏ̃|[gg
ԂĂ܂B͂Ă͈SŁAʂ͂̂܂܂ɂĂׂł
傤BB̗ÓÃ|[gŎۂɃT[rXsĂꍇł
BƂ X Window  6000  6900 ԃ|[gœĂ܂BtHg
ET[o𓮂ĂȂA炭 7100 ԃ|[ggĂł傤
B|[gT[oœȂAt@CA[EH[ŃtB^
ׂłB

 

4.3. inetd

ł́A inetd ĂƂɂ܂傤B낢ȃT[rXN
Ă܂Binetd "X[p[ "f[łBǂĂĂ΂邩
ƂƁÃf[N̂𐧌䂵Ă邽߂łBtelnet  ftp
ArshAidentdApop3 ƂT[oEf[̂́Ainetd 
Ă܂B ps  netstat gĂ telnetd ĂȂ
񂪁A inetd  telnetd N悤ɐݒ肵ĂȂAN
̎ɂ͎ۂɐڑĂȂ߂łBĊO炱̂ǂ
T[oANZX\ǂ͂Ƃ͊mFłȂł傤Binetd 
N邱̃T[rX́A/etc/inetd.conf Ƃݒt@CŐ
Ă܂BCɓ̃eLXgEGfB^ł̃t@CJĂ݂Ă
B"#" T[rX̑Oɂ΁ÃT[rX͓܂B
Ă݂܂B 

 
 #ftp    stream tcp nowait root /usr/sbin/tcpd in.wuftpd -l -a -L -i -o
 #telnet stream tcp nowait root /usr/sbin/tcpd in.telnetd
 #
 # Shell, login, exec, comsat and talk are BSD protocols.
 #
 #shell stream  tcp   nowait  root   /usr/sbin/tcpd  in.rshd
 #login stream  tcp   nowait  root   /usr/sbin/tcpd  in.rlogind
 #exec  stream  tcp   nowait  root   /usr/sbin/tcpd  in.rexecd
 #comsat dgram  udp   wait    root   /usr/sbin/tcpd  in.comsat
 #talk   dgram  udp   wait    root   /usr/sbin/tcpd  in.talkd
 #ntalk  dgram  udp   wait    root   /usr/sbin/tcpd  in.ntalkd

<snip>
 
 auth   stream  tcp   nowait  nobody /usr/sbin/
in.identd in.identd -l -e -o

   

ΓȂȂ܂Bidentd ͂̃t@CǂłN܂
̂ŁASɂĂȂRgOȂ܂܂ɂĂĂB
ŏȂAL̃R}hsĂB 


 # kill -HUP `pidof inetd`                                          


"obNENH[e[V"ł邱ƂɒӂĂB inetd 
`[jOȂ "tcp_wrappers" oRɂĂB hosts_access
 tcpd  man ĂB 

xinetd ͓悤ȃf[ŁAinetd ̂ƂĎg܂BقƂǓ
̂Ȃ̂ŁA𓖂Ă͂߂邱Ƃł܂BAݒ͎኱
ȂĂ܂BT[rXꂼ̐ݒ́Aʂ̐ݒt@C(ʏ /etc/
xinetd.conf)Ƃ̃TufBNgōs܂(ʏ /xinetd.d/*)B 

 
 # description: The telnet server serves telnet sessions; it uses 
 # unencrypted username/password pairs for authentication.

 service telnet
 {
  disable     = yes
  flags       = REUSE
  socket_type = stream        
  wait        = no
  user        = root
  server      = /usr/sbin/in.telnetd
  log_on_failure  += USERID
 }

   

T[rX؂ɂ́A"disable" Ƃڂ "yes" ƂAxinetd ċN
ĂB

 

5. ptH[}XE`[jOƃguV[eBO

5.1. `[jO

ڑē삵Ă킯łA͂u[vW 9vœ
̂lł傤BɑA@͂Ȃ̂ł傤H

Linux ̃lbg[N@\́AftHgŉ"`[jO"ĂȂ
łȂ苭͂łBȏ㉽KvȂ܂B
҂Ăقǐڑ킵ȂꍇAǂɖ肪\
܂B"Z"ɐSĂ݂鉿l邩܂B

ƂĂςȖڈłAő哯x͎QlɂȂ܂B͓db
ǂɂ DSLAM ̋ɍE܂B 

  0-12 K ft (0-3.6 km) - 2000 Kbps or more (8100 max for ADSL)
  12-16 K ft (3.6-4.6 km) - 1500 Kbps -> 1000 Kbps
  16-18 K ft (4.6-5.4 km) - 1200 Kbps ->  512 Kbps
  18-?? K ft (5.4-?? km) - 512 Kbps ->  128 Kbps or less :(

ɂĂAe^ƍlv͂񂠂܂B
DSL ͂̓_⒆p@\̂悤Ȋ֘AZpmɉPĂł傤B

lbg[ÑI[o[wbh(TCP  ATMAC[Tlbg)ɂāAf
s\ȓx 10 ` 20 % ł傤B1500 Kbps ł̐ڑ
 1100 `1300 Kbps xœƎv܂Bꂪ̑xłBg
ݍς݂̃vgR̃I[o[wbh𒲐Kv͂܂B܂A
voC_񋟂鑬xT[rX̎𗎂ƂĂ΁AĂ
ȏ͂܂B܂\M̕iAɂƂȂxɑ΂
ĉe^v͌Ȃ܂B̒ɂ͐ł̂
B 

 

5.1.1. TCP Receive Window

ʂȂAftHgŃCXg[Ă Linux ōœKȐ\ł͂
łB WIndows 9x [U TCP Receive Window (RWIN)𑝂₷ƂŌI
ɑxオ܂B͂܂ɏl邽߂ɋN
܂BftHg̒l 32 KB ł Linux ɁA͂܂Ă͂܂
܂B 

ÓAIɐڑ҂NꍇłBƂ΁A߂ɂvoC
_̐ڑ|CgƎgpɑςȂقǂ̒x(250ms ȏH)o
ȂA TCP Window 𑝂₷ƗǂȂ邩܂BTCP Receive
Window ₻Ɋ֘AɂẮA http://www.psc.edu/networking/
perf_tune.html ĂB  

Receive Window ̓obt@ŁAf[^t[̐ɖ𗧂Ă܂B
ɒ[ɏƁA{glbNƂȂāAX[vbgቺĂ܂
܂B̒ĺAш敝ƒxɂčE܂Bx͂Ȃǂ
M鑊Ƃ̃EhEgbv^C(RTT)̕ϒlƂČvł܂B
 pinggđł܂BƂ Linux ̃ftHg̒l 32
KB łA͑x 2 Mbps ܂łɑΉłAx 125ms xɂȂ
܂Bꂪ 1.0 Mbps Ȃ΁Ax 250ms ƂȂł傤B̒l
傫߂ƁAX[vbgtɗĂ܂܂Bł炱
͑傫ȂłB  

j[W[h Juha Saarinen ɊӒv܂B

    tcp ̃obt@Ɋp̂ɁA"lbg[Ne(bandwidth
    delay productBGh|CgƂ̃pCv̑)"Ƃ퓅i
    ܂B
   
    Buffer size = Bandwidth (bits/s) * RTT (seconds)
   
    ̏ꍇƁAł悻 8 Mbps łB ATM lbg[Ń`
    3.5 Mbps ܂łڑT|[gĂ܂B̓C^[lbg̒
    ͂ꂽɈʒuĂ܂A1,500 oCgƂ[ȑ傫̃p
    PbgŁARTT 𕽋 250ms Ƃ̂ (3,500,000/8)*.25 = 106KB 
    obt@ݒ肷Kv܂( 128 KB ł܂B
    ŏ[ł)B 
   
Receive Window  /proc t@CVXeœIɐݒł܂Bݒ肵
obt@̑傫 2 {̒l͂Kv܂B 


 #echo 262144 > /proc/sys/net/core/rmem_default                     
 #echo 262144 > /proc/sys/net/core/rmem_max                         


L̗ႾƁAۂ 128K Ƃlݒ肵Ă܂BSend Window 
Đݒ肵Ă܂B Send Window  DSL ڑɂ Receive
Window قǑjQvɂ͂Ȃ܂B 


                                                                    
 #echo 262144 > /proc/sys/net/core/wmem_default                     
 #echo 262144 > /proc/sys/net/core/wmem_max                         


̒l sysctl gĂݒł܂Bman ĂB

̑ƂāAJ[l̃IvVŐłl͉L̒ʂł(v
̂ł)Bɂĉ肬`[jO܂B


# sysctl -a                                                         
net.ipv4.tcp_rfc1337 = 1                                            
net.ipv4.ip_no_pmtu_disc = 0                                        
net.ipv4.tcp_sack = 1                                               
net.ipv4.tcp_window_scaling = 1                                     
net.ipv4.tcp_timestamps = 1                                         

 

5.1.2. C^[u

"C^[u"́AADSL  DMT gꍇɗpG[
݂̂łBDMT  ADSL ̕WƂȂĂāAADSL Ŕєĕy
̕@łBC^[úADSLAM Ő₦ԂȂʐMf[^obt
@OAG[s܂B̋@\́AdbNĂ
悤ȁAǂ痣ꂽŔɌʂ𔭊܂Bł͂̃obt
@ڑ㖳łȂxNĂ܂܂Bł炻Ȃ̉
iłȂAC^[u͎bg͂܂񂵁Aۂ
͕sKvɒxȂ邩܂B 

C^[u̓p[^ŒłAdbЂLɂ薳
܂BdbЂ̂قƂǂ́AftHgł͗LɂĂ悤łB
邱Ƃŉ肳AeNjJET|[gւ̓db点邩
łBA[UׂĂA̋]ɂȂĂ̂łB

C^[uĂ邩ǂmFA܂ύXɂ͂ǂ
炢̂ł傤HʓIɂ́A1  2 zbvɑ΂
traceroute  25ms ȓxȂAC^[uɂȂĂ
ƍlĂقڊԈႢȂƎv܂B̗vAƂΎۂǂ̒x
̃zbv邩ǂƂƂ܂B{̂Ƃmɂ́A
dbЂ̒Nɕ܂Bu͈Ղvł傤B 

"FastPath" DMT́A"C^[u𖳌ɂ" ƂƓӖłBJ
܂A ADSL  DMT ̑gݍ킹ɂĂ͂܂܂B 

 

5.2. ݒu̖

܂ƂȂAڑ܂łłȂȂÃZNV
ǂłBf̎舵ǂŁAf LED 
\Ă̂mFĂ(f̑́AԂIWFŌ
Ă邱ƂŁAĂȂƂ\Ă܂)B

 

5.2.1. Ȃ

f̓\ LED ΂ɂȂƂȂB

 E ŐݒuꍇADSL WbNXvb^̔z
    l܂B܂\ƂēdbЂ̕WI POTS foCX
    zɂȂĂ邱Ƃl܂BLQƂĂB
   
 E f Linux ΉiłHC[TlbgC^tF[XȂA
    ͋NȂ͂łB PCI  USB f̏ꍇA
    ̓hCoKvɂȂƎv܂B̓_܂삵Ȃɂ
    ĂāA܂ PCI  USB f Linux ΉĂȂRƂ
    Ă܂B
   
 E voC_ɘAĉłĂ邩mFĂBN
    ւ܂̂͂悭邱ƂłBmF̂߂Ƀ[g̃eX
    gsƎv܂BDSLAM _EĂ邱Ƃ[gmF
    \łBdbЂ͏[ɏmĂ͂łB
   
 E f̓dR[h𔲂āAǂɂĂWbN DSL R[h
    𔲂ĂB NID(db{bNX̊O)ɂeXgp
    WbNɑ}ĂBd̂ɁAR[hKvɂȂ邩
    ܂BꎞIɓ()̓dbւ̔z؂܂B
    ΁A̔zȂǂ̖̂ɌʓI͂ł
    BNIC ɐڑC[TlbgEP[ũeXgŝɓāA
    ڑKv͂܂(̓C[TlbgEfɂĂ͂܂
    ܂)Bf̓P[uȂĂȂƂ܂ł܂ (u
    ͈Ղvł)B\ȂAVXef̏Ԃ
    ƂɈړāA(\ȂA)x𑪂ĂB
    œ΁A炭̔zɉ炩̖肪邩ADSL ̐ɓd
    CIȊNĂƍl܂BXvb^ƕǂɐݒuĂ
    WbN̐ڑmFĂBXvb^ݒuĂȂȂ
    AzȏWbNׂĂ̕s̂(ƂΕHĂ
    Ƃ)ړ_AȐڍ_A͌׃}CNtB^{
    oĂB
   
    L̃eXgœȂȂAĂȂAf
    Ă邩ADSLAM Ă邩̂ǂꂩłBPCI  USB f
    ́Aɂ̓hCo[hĂKv܂B
    ł̃eXg͂╡GɂȂĂ܂܂B
   
 E }CNtB^ݒuĂȂAꎞIɎ苎āA킹
    FAX ̓dbЂ̃foCXׂĔĂB}CNtB^
    ĂāAV[gĂ邩܂B
   
 

5.2.2. lbg[NEJ[h(NIC)̖

ŖƂȂǏ́ANIC FłȂA̓W[[h
łȂAifconfig C^tF[XAbvłȂȂ
G[ɂĂłB 

 E BIOS ̃vOvC𖳌ɂĂBBIOS ł́A"Microsoft
    ȊO OS" ́AƎ\ɂȂĂƎv܂BNIC 
    IRQ 0 ɊUĂꍇ̏ǏɂȂꍇ܂B
    "resource temporarily unavailable" ƂbZ[W\邩
    ܂B
   
 E cat /proc/interrupts Ɠ͂āAIRQ ̋`FbNĂB
    NIC  IRQ LĂȂAʂ̃XbgɈڂA BIOS  IRQ
    ̐ݒĂBISA J[hȂ烁[J[ZbgAbvE
    [eBeBɓKv邩܂Bg
    IRQ ݒ肵ĂB̃[eBeBgɂ́ADOS Ńu[g
    Kv邩܂B
   
 E ЂƂƁAW[[hłĂȂ܂
    B /usr/src/linux/Documentation/* ɂJ[lE\[Xɕt
    hLgǂŁAgpĂJ[h̓`bvZbgɂ
    ĒׂĂB܂ /usr/src/linux/drivers/net/*.cɂ́AX̃`
    bvZbgɂẴRgXV񂪂܂BƂɁA
    ̃W[񋟂ĂJ[h܂B tulip 
    3Com ̃J[hɓĂ͂܂悤łBu[g̃bZ[WāA
    lspci -v ŃJ[lJ[hǂFĂ邩ĂB
    insmod  rmmodAmodprobe gĂ낢ȃW[eXgł
    ܂Bڂ́Aꂼ man ĂB
   
 E [J[ Web TCg Linux ֘ÃhLg𒲂ׂĂB
    ́A Donald Becker ̃TCg http://www.scyld.com/network/
    ŏW߂ĂB
   
 E Linux p NIC hCóAW[ɂȂ܂AƂ
    񍐂܂BȂ킿AW[ɂȂŁARpCăJ[
    lɑgݍł܂܂B
   
 E ܂J[hhCoāAsł邱Ƃl܂B
    ̃J[hɌĂ݂ĂBō\ȃJ[h͕KvȂ
    tĂ܂B
   
 

5.2.3. IP ڑ̖

̃ZNV́AfANIC FłAmɓ삵Ă邱
ƂmFĂāANCAE\tgEFACXg[ĉG
[oĂȂ̂ɂ炸AISP ֐ڑłȂꍇɓǂł
B LED ŎۂɃf̓Ă邩_ĂBIP 
sƂ́Aifconfig ŃANeBu eth0 C^tF[X (
 PPPoX p ppp0 C^tF[X)\ȂƂł킩܂B
́Aping Q[gEFC≽ɑłƁA 'network unreachable' ⎗
悤ȃbZ[W\܂B

 E ISP ̃vgRgĂ邩mɗĂBDHCP 
    PPPoX gĂ܂HԈႢȂݒ肵Ă邱Ƃ؂łBeN
    jJET|[gɘAKv邩܂B
   
 E DHCP gĂȂAISP  MAC AhXɂF؂KvƂ܂
    BȂAAhXɂȂĂ܂H ISP ͎
    łԈႢĂ܂񂩁H ISP zXgɂF؂KvƂĂ
    ܂񂩁H́A"-h" ƂIvVăR}hłĂ΂킩
    ܂B
   
 E /var/log/messages JāAɗȎ肪肪Ȃ
    ĂB܂Aڑ͂߂悤Ƃ鎞 tcpdump 𓮂Ă
    Btcpdump ̏o͂͂Ȃ߂Ă܂A炩̔邩
    ۂ͔fł͂łB
   
 E PPPoX ȂAISP  ID Ƃă[UA[U@hCg
    ܂񂩁H
   
 E ftHgEQ[gEFC̃AhX ping Ă݂ĂBf
    tHgEQ[gEFCɂ́uroute -nvƂĂBIP
    AhX(Ƃ 111.222.333.444 ̂悤) ping ͂ł邪AzX
    gł͂łȂꍇ́Al[ET[o /etc/resolv.conf Ő
    ݒ肵ĂȂ\܂B
   
 E PPPoE ɂĂ PPPoE NCAgŃC[Tlbg̃C^tF[X
    AbvĂBu[gɂ̓AbvȂłBPPPoE N
    Oɂ̓ftHǧoHđ݂邱ƂȂ悤ɂĂ
    B rp-pppoe ̏ꍇA/etc/ppp/options ɉLqȂ悤ɂ
    ĂB҂ł David Skoll Ă܂B
   
 E t@CA[EH[(Ƃ ipchains g)𓮂ĂȂA
    ꎞIɗƂĂBݒ肪ԈĂApPbgʂ
    ĂȂ܂B
   
 E f ISP ȊÔƂ납wȂAKĂȂf
    ܂BƂ SDSL ɂ SDSL fKvłB܂ ADSL 
    ẮA CAP  DMT @\KvŁA͑ DSL ƌ݊
    ܂B
   
    f ISP 񋟂T[rXɍ킹Đݒ肷Kv邩
    ܂Bf VCI  VPIAJvZOɂĂ̐ݒ肪\ɂ
    Ă܂BeNjJET|[gɓdbāA𓾂ĂB
    ʃf̐ݒ telnet  Web uEUgāAf IP Ah
    XɂȂōs܂B
   
 

5.3. ̖

̃ZNV́Aڑ͂܂̂̓ƂȂA
fIɐ؂ꂽAxĂ܂A"͂Ă邪C
^[lbg𗘗płȂ"AƂꍇɓǂłB (
ȃfł΁Ax@\Ă܂Aʂ telnet 
Web uEUgĊmFł܂B}jAĂ)B

؂錻ۂ DSLAM (OƂ)̓fɖ肪
ɔ܂BDSLAM ͈ʓI"J[h"𕡐"Xbg "ɓ悤
ɂȂĂ܂BƂ΁AAlcatel DSLAM J[h̓J[hPʂɐڑ 4 
ł悤ɂȂĂ܂BJ[hȂƍő 4 [UQ
܂B|CǵA؂̏ႪɌꂽ͈͂̂̂ł
ƂłBL͈͂ȃ[Uɉeolbg[NQƂ͈قȂ܂B
̖͓dbЂ̖łAISP ɂ͊֌W܂BT[rX_
ISP ƌłȂAdbЂɃR^Ng ISP ̒S҂ɃR^
NgƂĂBy󒐁F DSLAM ̃J[h́A <http://
www.tality.com/technologies/xdsl/dslam.html> `łz

xቺADSL ̐Mؒf肷P[X́AlXȖ
N܂B̂悤ȏԂł͍ōx𓾂邱Ƃ͂ǂĂ
ł傤B̏Ǐ󂪎̖Ȃ̂AvoC_Ȃ̂A͂
肵Ă킯ł͂܂B

Ƃ΁A̔zڑȂpPbgĂ܂Ađ
NĂ܂܂BȂƎۂɃX[vbgAڑቺ
܂܂B̓lbg[N̖Ƃď]瑶݂ĂpPbg
EXƍlłADSL ɂĂ͉sǂMA̓f
̖̂ɂċN\܂B

Ă݂ƂB

 E f̓dXCb`؂āAɓ꒼ĂBd{^
    ̓XCb`؂āAǂ̃WbNɐڑĂP[u𔲂
     30 bƂĂBԂdāAWbN
    ɑ}ȂĂBŋIɍē܂BPCI f̓d
    𗎂Ƃɂ́Aɂu[g邵肪܂BŃf
    ɋN"͂邪AC^[lbg𗘗płȂ"Ƃ
    邩܂B̏󋵂łlɒ邩܂B
   
 E f牽炷ׂĂ NID ɈړāA̔zׂĂI񂷂
    ȂAL̃ZNVĂB󋵂ŉPȂA
    ͑̂ǂɂ܂BPȂȂdbЂ̖łB
   
 E RFI \DSL ͑e󂯂₷MłBe^̂
    ɂ񂠂܂BRFI(Radio Frequency Interference)́A
    ItBXɂ܂ɑ݂ĂāAMx߂Af
    IɐؒfAx𗎂Ƃ肷錴ɂȂ܂BȒP
    ɃeXgɂ AM WIg܂BǂꂢɎMłǂ
    `[jOĂBǂł܂܂BAM WI RFI 
    oł܂B AM WI DSL ̐MƓ悤Ȏgg
    Ă邩łBRFI "x[Ru߂"悤ȉԂ
    Ȃ܂BRs[^̓duɋ߂ÂĂ݂ĂB悤
    ԂɂȂ͂łBƂɕȂȂ܂B RFI
    Ŕ鉹ǂ̂悤Ȃ̂킩Ǝv܂B܂Ƃȕi̓d
    úAyx RFI Ȃ͂ł\NȂxł
    BKCK[EJE^[̂悤ɃWIf DSL ̔ẑ΂Ɏ
    ĂĂB󋵂ɂȂΌ{ĂB
    ̂́AduψAAdC[^[AXCb`APx
    ȏƖłBfړAP[u̔zΏ[łBf
    ƕǂ̃WbN̊Ԃł邾߂̂ǂĂłBy󒐁F
    ADSL ̗pǵAƉňقȂ܂B͖ 30 `
    140kHz łB G.lite 550kHzAt[g 1104 kHz܂ŗp
    Ă܂z
   
 E IɓȂ́AĂ̂ǂɖ肪
    ܂BPɐڑŁAȏꏊ
    ΁AȒPɒꍇ܂B͓dbЂ̗DꂽZpƂ͂
    eȂ󋵂قƂǂłBvoC_ɖ₢킹Ă
    BKvΒJɂĂB炢񂵂ɂȂAS
    ł͂ȂiĂяo܂傤B
   
 E DSL 𗘗pł鋗肬̈ʒuɂāA؂ꂽAȂ
    肷ȂA"z[E" ̐ݒusĂ݂ĂBL
    B͐M⓯̏Eɋ߂ꍇɌʂ܂B
   
 E T[WEveN^gĂȂAOĂ݂ĂBDSL
    ̐Mɉe^̂܂B
   
ߏɂ AM WIǂs@ɃA}`AĂ̂悤
gĂ̂ŁAe󂯂邱Ƃl܂B̓ł
񐔂Nꍇ܂BƂ΋ǂɂȂďo͂
肷ꍇȂǂl܂BDSL ZpDꂽdbЂȂA̖
ŏɂ邱ƂłƎv܂BP[XoCP[XłB

 

5.4. lbg[NƃX[vbg̖

̃ZNV͐ڑ͂łĂ邪AX[vbgoȂĂ
ꍇɓǂłB܂_񂵂Ărbg[gɑ΂āA
X[vbgoĂȂꍇdbǂ̋ꍇɓ
͂܂܂Bł"lbg[N"Ƃ́AWAN w܂\ISP ̃Q[g
EFCƃ[J̃Tulbg̓obN{[̊Ԃw܂BE
ɋ߂͓xĂ܂ƂYȂłB̓X
[vbgɂe^܂BLĂB 

"x""pPbgEX"{߂Ă 2 ̗vłB҂Ƃ ping
 traceroute ƂWIɎglbg[NEc[g΂
ȒPɌvł܂Bǂ炪ŋNƂĂBptH[}X
ɉe^܂Bx "̑""҂"Ӗ܂Bɂ
Aɒ[ɒxNĂꍇɃ^[Qbg𓖂Ă܂BƂ̂A
̒x͏ɑ݂Ă邩łBpPbgEX́AɓB܂
̂ǂŃpPbg̃f[^Ă܂ƂłBTCP/IP ̓pPbg"
"Ƃ킩ƁAf[^đ܂BꂪN΁Aۖ
炩ɒxȂĂ܂܂BpPbgEX͗zIɂ 0 % ł͂
B 

gĂ WAN ̌oH́AdvłƂƔFKv
B traceroute قȂTCĝɂĂ݂΁A͂߂̐"zb
v "͓悤ł邱Ƃ킩Ǝv܂Bꂪ ISP ̃[Jȃob
N{[łA ISP ̏㗬voC_ւ̃Q[gEFCłB̌
Ă̖肪łAǂ̃TCgɑ΂ĂAȂ悤Ƃ
Aׂĉe󂯂Ă܂܂B

pPbgEXƒxɂẮA܂ ping  2A3 ӏɑ΂čsĂ
܂傤B\Ȃ班ȂƂقȂ 2A3 ӏɁB΁ApPbgE
XqłȂɒ[ȒxƎv܂B


 $ ping -c 12 -n www.linuxdoc.org                                   
 PING www.linuxdoc.org (152.19.254.81) : 56(84) bytes of data.      
 64 bytes from 152.19.254.81: icmp_seq=0 ttl=242 time=62.1 ms       
 64 bytes from 152.19.254.81: icmp_seq=1 ttl=242 time=60.8 ms       
 64 bytes from 152.19.254.81: icmp_seq=2 ttl=242 time=59.9 ms       
 64 bytes from 152.19.254.81: icmp_seq=3 ttl=242 time=61.8 ms       
 64 bytes from 152.19.254.81: icmp_seq=4 ttl=242 time=64.1 ms       
 64 bytes from 152.19.254.81: icmp_seq=5 ttl=242 time=62.8 ms       
 64 bytes from 152.19.254.81: icmp_seq=6 ttl=242 time=62.6 ms       
 64 bytes from 152.19.254.81: icmp_seq=7 ttl=242 time=60.3 ms       
 64 bytes from 152.19.254.81: icmp_seq=8 ttl=242 time=61.1 ms       
 64 bytes from 152.19.254.81: icmp_seq=9 ttl=242 time=60.9 ms       
 64 bytes from 152.19.254.81: icmp_seq=10 ttl=242 time=62.4 ms      
 64 bytes from 152.19.254.81: icmp_seq=11 ttl=242 time=63.0 ms      
                                                                    
 --- www.linuxdoc.org ping statistics ---                           
 12 packets transmitted, 12 packets received, 0% packet loss        
 round-trip min/avg/max = 59.9/61.8/64.1 ms                         


L͖肪ȂAʂ̗ł(̃TCgւ̌oH́AȂ̏ꍇ
͋炭܂قȂł傤BČʂ܂قȂĂ邩
܂)BxȂ悤Ȑ[ŐݓIȖ͂܂܂B
L̗͖肪łB


 $ ping -c 20 -n www.debian.org                                     
                                                                    
 PING www.debian.org (198.186.203.20) : 56(84) bytes of data.       
 64 bytes from 198.186.203.20: icmp_seq=0 ttl=241 time=404.9 ms     
 64 bytes from 198.186.203.20: icmp_seq=1 ttl=241 time=394.9 ms     
 64 bytes from 198.186.203.20: icmp_seq=2 ttl=241 time=402.1 ms     
 64 bytes from 198.186.203.20: icmp_seq=4 ttl=241 time=2870.3 ms    
 64 bytes from 198.186.203.20: icmp_seq=7 ttl=241 time=126.9 ms     
 64 bytes from 198.186.203.20: icmp_seq=12 ttl=241 time=88.3 ms     
 64 bytes from 198.186.203.20: icmp_seq=13 ttl=241 time=87.9 ms     
 64 bytes from 198.186.203.20: icmp_seq=14 ttl=241 time=87.7 ms     
 64 bytes from 198.186.203.20: icmp_seq=15 ttl=241 time=85.0 ms     
 64 bytes from 198.186.203.20: icmp_seq=16 ttl=241 time=84.5 ms     
 64 bytes from 198.186.203.20: icmp_seq=17 ttl=241 time=90.7 ms     
 64 bytes from 198.186.203.20: icmp_seq=18 ttl=241 time=87.3 ms     
 64 bytes from 198.186.203.20: icmp_seq=19 ttl=241 time=87.6 ms     
                                                                    
 --- www.debian.org ping statistics ---                             
 20 packets transmitted, 13 packets received, 35% packet loss       
 round-trip min/avg/max = 84.5/376.7/2870.3 ms                      


pPbgEX 35 % ܂B܂EhgbvE^Cl
xȂĂ܂B̗ƒׂƂ킩悤ɁAƂȂTC
gւ̌oHɂ̓obN{[̃[^[ 13 ܂Bꂪł
̃TCgxȂĂ܂A܂ܓ悤ȃ[^[ɓĂ
ꍇɂAoHɉeo܂B{ɖȂ̂́Aʉ߂郋
[^[œlȖ肪Ă邩ǂƂ_łB̃Q[gEFC
 2 Ԗڂ̃[^[܂B_ɃTCgIŁA
traceroute gČoĂB


 $ traceroute www.bellsouth.net                                               
                                                                              
 traceroute to bellsouth.net (192.223.22.134), 30 hops max, 38 byte packets   
  1  adsl-78-196-1.sdf.bellsouth.net (216.78.196.1)  14.86ms  7.96ms 12.59ms  
  2  205.152.133.65 (205.152.133.65)                  7.90ms  8.12ms  7.73ms  
  3  205.152.133.248 (205.152.133.248)                8.99ms  8.52ms  8.17ms  
  4  Hssi4-1-0.GW1.IND1.ALTER.NET (157.130.100.153)  11.36ms 11.48ms 11.72ms  
  5  125.ATM3-0.XR2.CHI4.ALTER.NET (146.188.208.106) 14.46ms 14.23ms 14.40ms  
  6  194.at-1-0-0.TR2.CHI2.ALTER.NET (152.63.65.66)  16.48ms 15.69ms 16.37ms  
  7  126.at-5-1-0.TR2.ATL5.ALTER.NET (152.63.0.213)  65.66ms 66.18ms 66.39ms  
  8  296.ATM6-0.XR2.ATL1.ALTER.NET (152.63.81.37)    66.86ms 66.42ms 66.40ms  
  9  194.ATM8-0.GW1.ATL3.ALTER.NET (146.188.233.53)  67.87ms 68.69ms 69.63ms  
 10  IMVI-gw.customer.ALTER.NET (157.130.69.202)     69.88ms 69.25ms 69.35ms  
 11  www.bellsouth.net (192.223.22.134)              68.74ms 69.06ms 68.05ms  


ŏ̃zbv̓Q[gEFCłBۂɂ͍ŏ 2 zbv͏ɓŁA
ŏ 3A4 zbv͂ĂłB܂Aǂ̖łĂA
KꂽƂĂ肪N蓾܂(Ȃg̖̗̓͂Ƃ
Ă邩܂)B"ʏ" Q[gEFCւ ping ́AL
̒ʂł(ɂƂĂ͂ꂪʂłI)B


                                                                    
 $ ping -c 12 -n 216.78.196.1                                       
                                                                    
 PING 216.78.196.1 (216.78.196.1) : 56(84) bytes of data.           
 64 bytes from 216.78.196.1: icmp_seq=0 ttl=64 time=14.6 ms         
 64 bytes from 216.78.196.1: icmp_seq=1 ttl=64 time=15.4 ms         
 64 bytes from 216.78.196.1: icmp_seq=2 ttl=64 time=15.0 ms         
 64 bytes from 216.78.196.1: icmp_seq=3 ttl=64 time=15.2 ms         
 64 bytes from 216.78.196.1: icmp_seq=4 ttl=64 time=14.9 ms         
 64 bytes from 216.78.196.1: icmp_seq=5 ttl=64 time=15.3 ms         
 64 bytes from 216.78.196.1: icmp_seq=6 ttl=64 time=15.4 ms         
 64 bytes from 216.78.196.1: icmp_seq=7 ttl=64 time=15.0 ms         
 64 bytes from 216.78.196.1: icmp_seq=8 ttl=64 time=14.7 ms         
 64 bytes from 216.78.196.1: icmp_seq=9 ttl=64 time=14.9 ms         
 64 bytes from 216.78.196.1: icmp_seq=10 ttl=64 time=16.2 ms        
 64 bytes from 216.78.196.1: icmp_seq=11 ttl=64 time=14.8 ms        
                                                                    
 --- 216.78.196.1 ping statistics ---                               
 12 packets transmitted, 12 packets received, 0% packet loss        
 round-trip min/avg/max = 14.6/15.1/16.2 ms                         


ႤɋNQ[gEGBł̖͉L̒ʂłB


 $ ping  -c 12 -n 216.78.196.1                                      
                                                                    
 PING 216.78.196.1 (216.78.196.1) : 56(84) bytes of data.           
 64 bytes from 216.78.196.1: icmp_seq=0 ttl=64 time=20.5 ms         
 64 bytes from 216.78.196.1: icmp_seq=3 ttl=64 time=22.0 ms         
 64 bytes from 216.78.196.1: icmp_seq=4 ttl=64 time=21.8 ms         
 64 bytes from 216.78.196.1: icmp_seq=6 ttl=64 time=32.0 ms         
 64 bytes from 216.78.196.1: icmp_seq=8 ttl=64 time=21.7 ms         
 64 bytes from 216.78.196.1: icmp_seq=9 ttl=64 time=42.0 ms         
 64 bytes from 216.78.196.1: icmp_seq=10 ttl=64 time=26.8 ms        
                                                                    
 --- adsl-78-196-1.sdf.bellsouth.net ping statistics ---            
 12 packets transmitted, 7 packets received, 41% packet loss        
 round-trip min/avg/max = 20.5/25.6/42.0 ms                         


41 % ̃pPbgEX́AɍlŁAHTTP ̂悤ɃT[rX
グĂƂł́AˑRĂ܂܂BT[rXĂƂ
ĂAƂĂxȂ܂B

ۂɋN̗ƁAQ[gEFC̒q̂ƂƎv
Ȃ܂BӂJČƁAdbЂ̃lbg[N DSLAM 
ATM ɖ肪܂BăpPbgEX傫ȒxƂ
Ȃ 1 zbvڂ̖́Aۂɂ͍ŏ̃zbvɂǂ蒅ȑOɔ
ꍇ肦܂B̖؂蕪̂ɖɗc[͂܂
BpPbgEX ISP  NSP ƓlAdbЂ̖ł蓾܂B 

܂fgpPbgEXN\[ɂ蓾܂B̏
́Af̓d꒼āADSL ̐ڑ 30 bƂĂē
Ă݂ĂB܂ڑɂǂ̏ꏊ\f DSLAMAATM lb
g[N\łĂpPbgEX͋N蓾܂B

ISP ̃lbg[Nɖ𔭌ȂAeNjJET|[gɖ_
񍐂ĂB

 

5.4.1. ̑̃lbg[N̖

GȂƂB  

 E [hłȂ Web TCgB PPPoX gĂ
    [UAMTU l܂ɂ傫ĂꍇɋN܂B PPP0
    foCX̓KȒl 1492 łÃTCgɂǂ蒅܂łɒʉ
    邷ׂẴ[^[A菭ȂƂ 8 oCglKv
    Ă܂Bǂ̃[^[ݒԈĂ΁A̖ɏo
    킵܂B MTU lĂ݂ĂB LAN ɐڑ
    ĂzXg͂l\1452  1412 ɂKv
    邩܂B
   
 E IP AhX ping łƖȂAzXgłƂꍇ
    B /etc/resolv.conf ɂl[ET[o̐ݒ肪ԈĂ
    BNCAg(DHCP, PPPoX)̃hLg𒲂ׂāAeLXgEGf
    B^ŒڏCĂBISP  DNS T[o̐AhX
    ĂB
   
 E PPPoX ؂BPPPoX ̐ڑ^؂ꂪɂȂ܂BPPP ͉
    󋵂ɍE₷AfIɐڑ؂錋ʂƂȂ܂B͉
    ŁAǂŔĂ邩˂~߂΁Aɉł܂B
    ʁX̃NCAg玎Ă݂邩ÃNCAgt̃hL
    gł̖𒲂ׂĂ݂ĂƎv܂B󋵂Ɉ
    悤ł΁AKvȂ cron ̃WuāAڑƍĐڑ
    ĂB
   
 E RȂC^tF[XoH_EĂ܂B ifconfig  
    routegƁAC^tF[XoH񂪂ǂ킯Ă܂
    ȂA̓oO NIC ̃hCôłBDHCP T[o
    ɂ킽ĉԂȂꍇlȌۂN܂(NCAg
    oOHƎv̂́ARedhat o pump ̏o[Wł̂悤
    ȃP[Xł)B
   
 E ptH[}XG[FȂ(Ƃ rht0 )ꍇ́A炭
    SdAd̕sƎv܂BDSL f⃋[^[̑
    ́Aʏ피dɐݒ肵ĂāANIC lɂȂĂ͂łB
   
 

5.5. X[vbǧv

X܂͂߂ɂeXg 1 ɑxv܂BɂāA
\zĂ肽ƂȂ̂AVXeDȂ̂mFł
܂BmɌv͎̂vقǂ₳͂܂B܂Albg
[NŎgpvgR̃I[o[wbhŁA10  20 % _lx
Ȃ܂B{ɂǂ̂炢"xȂ"́AvoC_̃lbg[N\
ɂĈقȂ܂BǂŁAǂ̂悤ɒlvɈˑ܂Bʂ
A10 ` 20 % 炢ɂȂ܂B

C^[lbgɃANZXƁAzbv邲Ƃɂ킸łptH
[}XቺĂ܂B󂻂傫ȉe͂ȂƎv܂BR
zbvłȂARs[^ׂā\Ȃ̃VXe
ISP ̃lbg[NA㗬 ISP ̃voC_AĐڑ\ׂĎ
̍s͂@BƓ悤ɁA̎xȂĂ肷
BAQ΁\̗vdɂgݍ킳Ă邱ƂA
ėłł傤HoH̃[^̂ǂꂩɋsR̃C^t
F[X 1 ł΁AʂɂȂĂ܂܂B 

mɍő呬xoł낤ڑ́AĂ ISP\ISP ̃Q[gE
FCłBֈCɉ΂ŁAo邱Ƃ͂ȂłB܂
zIȃeXǵAł邾߂ƂłB͉\Ȍ\
złȂv̐X菜邩łBISP Ƀ[J ftp T[o
ȂAeXgsD̏ꏊɂȂ܂(traceroute āA{
[JȂ̂Ă)B

ISP  ftp T[oĂȂȂA߂ɂ ftp TCgTĂ
\zbvł邾ȂD܂łB܂ɂȃT[o
ĂBłȂƂȌʂɂȂĂ܂܂B傫ȃt@C
ā\ 10 MB x\A_E[hԂvĂB
Ă݂ĂB܂AʁX̎ŎsĂ݂ĂBT[oo
bN{[́A1 ̒ł鎞ɖZꍇ܂̂ŁBȂ
ƁAʂ䂪݁A]vȗvł邾rKvłĂ邩ł
BvoC_́AobN{[̃gtBbNdƂ{glbNAx
ĕׂdT[oɑ΂Ă͕ۏ؂Ă܂B 

eXgTCgɎU݂Ă܂BǂƂ܂Ab
ɂĂĂB܂ɂv񂠂邽߂ɁAeXg
ڑX[vbĝ̏̌vl͐młƂ͌܂B
̃TCgł́AȂׂƎvĂl̋e͈͂ɂ邩
AȂƂTvނ炢͂ł邩܂BxeXg
ĂE߂́Ahttp://www.dslreports.com/stest/0  http://
speedtest.mybc.com/ <http://speedtest.mybc.com/> ܂(Ƃ
Java Kvł)B̃TCǧʂ͐mƎv܂B 

ŖYĂ͂Ȃ̂́A悻 10 % ` 20 % ̃lbg[ÑI[
o[wbhƂ󂯂邱ƂłBグĂ܂B̏ꍇ́A
1472 Kbps ƂxłB炨悻 15 %  1275
Kbps ƂȂ܂B̓x́Adbǂ 11,000 tB[g( 3,350 m)
邱ƂlƏ[ȑxŁAۂɂ 1275 Kbps ܂肨悻 1.2
` 1.3 Mbps ƂAő̃X[vbgoĂƌĂƎv
܂\̏Ȃ΂łBdslreports.com ̑xeXg͉L̒
łB 


 Test running..Downloaded 60900bytes in 5918ms                      
 Downloaded 696000bytes in 4914ms                                   
 First guess is 1133kbps                                            
 fairly fast line - now test 2mb                                    
 Downloaded 1679100bytes in 11090ms                                 
 Upload got ok 1 bytes uploaded                                     
 Uploaded 1bytes in 211ms                                           
 Upload got ok 1 bytes uploaded                                     
 Uploaded 1bytes in 205ms                                           
 Upload got ok 1 bytes uploaded                                     
 Uploaded 1bytes in 207ms                                           
 Upload got ok 50000 bytes uploaded                                 
 Uploaded 50000bytes in 2065ms                                      
 Upload got ok 100000 bytes uploaded                                
 Uploaded 100000bytes in 3911ms                                     
                                                                    
 ** Speed 1211(down)/215(up) kbps **                                
 (At least 24 times faster than a 56k modem)                        
 Finish.                                                            


1.211 Mbps ƂĺAT[rXɑ΂ČIɊ҂ĂlƂقړ
łB̌ʂɑ΂āAguV[eBO`[jO@T
oC͂܂B 

xIIIFĂ ISP  Web y[WpɃLbVEvNV
𗧂ĂĂ܂B͂̎ Web x[X̃eXǧʂȂ炵Ă܂
܂BꂪȂ΁AeXǧʂ͖炩ɒxȂĂ܂ł
傤BvNVƁAۂ̓vNṼX[vbgeXgĂ
邱ƂɂȂĂ܂܂\eXgTCgł͂ȂBQl܂łɁAʂ̌x
Bɕʂ̃eXgTCgv܂A 600 ` 700 Kbps RX^
gɏo܂B܂AP[XoCP[Xł(́AꏭȂA
ꂼꓯ悤ȌʂoĂ܂)B2 ̈قȂTCg傫ȃt@C
 ftp ČvĂB̏ꍇ́A 1.25 Mbps łB  

 

6. t^: DSL ̊T

DSL ͓dbŎZpŁÂΓgāApō
C^[lbgڑ܂BDSL( ADSL)̒Ƃđ傫̂́A
"POTS"(Plain Old Telephone Service)ƌ邱܂ł̉T[rXƉ
Lł_ɂ܂B͉p͈(db 4 KHz ܂)
Ƃ͈قȂA荂g𗘗p邱ƂŎĂ܂B{͂
1  2 ɂł܂B1  POTSA 1 ̓C^[lbgڑ
BׂĂ܂Ă΁A""ɂ͉̉e܂B
Ƃ DSL ʏ҃x[XɍLĂƂ\ɂAvoC_
̃RXgŏɂ邱ƂɂȂ܂B  

DSL ͌l SOHO sɃ^[Qbg𓖂ĂĂāAȃC^
[lbgڑ[YiuȉiŎlɂȂĂ܂B
͐pŊ蓖Ă̂ŁA"펞"ڑ\ŁA[Gh~h
W̑ш悪KvȃT[oɂpł܂B܂AK͂ LAN ڑ
̂ɂœKłBLinux ̃p[[ULш~ꍇɂ҂
ł :-)B 

dbЂ₻̑Ɨn̓dCʐMƎ(CLEC)́ADSL P[u TV 
̃T[rXƓ̂̂ƂčLĂ܂\P[u TV ́Aʏ҂
SOHO ̃T[rX̋҂łBɂ"s̎荇"D
Aɋ(ƂłI)AҎsɑ̍o
́AIȂLĂ܂BDSL ̃voC_(Ă͓dbЂł
Ał͂Ȃꍇ)́ADSL ̃Ct񋟂Ă܂B͉
łADSLAM łAOƂ̕IȐڑł肵܂B
]C^[lbgڑT[rX񋟂Ă ISP pĂ
킯łB

ʏҌ DSL ́A"xXgEGtH[g"T[rXłBT1 
̑xꂵAꍇɂĂ͂𗽉킵܂AT1 قǐM
ł͂܂BrWlXΏۂ DSL ͈ʏҌRXg
܂A荂ȕMƑш悪DƂȂ܂BSʓIɌāA
DSL ̃RXg͂܂ł̓dbЂ̃T[rXAƂ T1 ƔrāA
⏬K͂ȃrWlXɂƂĖ͓Ił[Ɏ荠łB 

DSL voC_́Al[Uɂ̓T[rXK߂ĂȂꍇ
܂BrWlXENX DSL T[rX́A T1 Œ߂
悤 SLA(Service Level Agreements T[rXɂĂ̋K)
Ă܂B 

}CiXʂƂāADSL ͂ǂłpł킯ł͂ȂAƂ_
܂Bp₷◘płrbgE[g(x)́AǂɏZł
AdbЂ炩ߗpӂĂKvݔǂɐݒuĂ
ɂ܂Bǂ̂炢dbǂɂ DSLAM 痣Ă邩Adb(
)̎͂ǂ̂炢AƂƂɂE܂B 

 

6.1. DSL ̒

 E ADSL
   
    Ώ̃fW^Ґ(Asymmetric Digital Subscriber Loop)́A
     8 Mbps  1024 Kbps ̑xł͒񋟂Ă܂Bꂪ"
    񓯊"ƌĂ΂RłB DSL ̒ł͍łWJĂA
    ASOHO sɊJ܂Bȉ葬x́AT[oƂăN
    eBJł͂Ȃ́\ȂƂK͂Ōlŗグ Web TCg
    ɉ߂Ȃ́\ɓKĂ܂BADSL  POTS ƌĂ΂鉹ƃf
    [^L\ŁAǉKv͂܂Bꂪ傫Ȕ
    ɂȂĂ܂BADSL ͑ DSL ƓlAɐ񂪂܂B
     18,000 tB[g(5.5 km)dbЂɂƂĂ̌E_ɂȂĂ܂
    Bʏ ADSL ́AXvb^̓tB^𗘗p POTS  DSL 
    M𕪗Kv܂BG.Lite DSL Ƌʂ邽߂ɁA"t
    [g" ADSL ƌꍇ܂BADSL 𕄍̂ 2 ̕@
    ܂B́ADMT  CAP łBDMT(ʖ Alcatel ݊)́AW
    푈ɑłA݂ł͕WƂđʓIɂȂĂ܂B
    ܂Af͂̕ƌ݊Ă͂AƂƂL
    ĂB܂ACAP f́ADMT T[rXł͎gA܂
    ̋t^łB
   
    y󒐁FčƔrāA{͂ɉiɑ΂}CiXv
    ܂B́AdbǂƓdbpҊԂ̋ 7 km Ƃꍇ
    邱ƁȂ 0.1 mmׂ(č 0.5 mm œ{ 0.4 mm)
    AΐԂ̐≏ޗɎgĂꍇ邱(čׂ͂
    vX`bN)łBz
   
 E G.Lite
   
    G.Lite ́A"DSL Lite"  "Universal DSL"A "splitterless ADSL" ƌ
    ΂邱ƂAXvb^KvƂȂ̓tB^g
     ADSL łBƃf[^̐M͓̕dbǂōs܂B
    G.Lite ́A 1.5 MbpsA 512 Kbps ̑x܂Œ񋟂Ă܂B
    ܂ꎞ͈ʏҌ DSL T[rXƂėDɂȂƎvĂ
    ܂BĂ鎞_ł́A"t[g" ADSL Ɠl
    LĂƂ͂܂B
   
 E SDSL
   
    VOyAEfW^Ґ(Single-pair Digital Subscriber Loop)
    ́A"Ώ̃fW^Ґ(Symmetric Digital Subscriber Loop)
    "ƂĂ΂ĂāAۏAƂő 1.5 Mbps ƂΏ̂ȑx
    oĂ܂BSDSL ͐pKvƂĂāAADSL ̂悤Ɉʏ
    ҌsƂĂȂƎ󂯓̂ł͂܂BSDSL
     ISDN  H1 Ɠl 2B1Q gĂāA ADSL g
    Ă DMT  CAP QɋƂ݂ȂĂ܂B{
    SDSL ͈ʓIɃT[o^płi DSL ƍlĂ
    B{̂ƂӖ́AvoC_̒ɂ "SDSL" Ə̂ċꂵ
     ADSL 𔄂荞łƂ낪邩łB͏A肪
    ƂƂłB́A΂ɔΏ̂̑ш敝 SDSL 
    ܂B[ɖ󂪉ȂȂ܂ˁH
   
 E IDSL
   
    ISDN fW^Ґ(ISDN Digital Subscriber Loop)́A艺Ƃ
    144Kbps ̑xALucent Technologies ׂĐVKɊJ
    ISDN łBISDN  SDSL lA2B1Q sĂ܂B
    IDSL ͐pKvƂ܂B͑ DSL lA"펞ڑ"Zp
    ܂B] ISDN ɑ΂ 16 Kbps Ă܂BDSL voC
    _̒ɂ̓[GhxƂĔ̔ĂƂ܂B
    Ai ADSL ̂悤ȍȒʐMɂ͏[Ƃ͂܂B
   
 E RADSL
   
    Rate Adaptive Digital Subscriber Loop ́AWestell JAő
    肪 2.2 Mbps܂ŁA肪 1.0Mbps ƂȂ܂BRADSL _Ƃ
    闝ŔAx(艺Ƃ)̏Ԃɂ킹ēIɕϓ
    _ɂ܂B͋₻̗̑vŉԂEɂꍇ
    ɁADꂽ\ȈĂƂȂ肦܂BRADSL  ADSL ̋@\lX
    ȓ_gAԑ΂ĂK悤ɂȂĂ܂BADSL
    ƓlɁARADSL  POTS ̉ɑł܂B RADSL ̓Xvb^
    tB^svłB
   
 E HDSL
   
    High bit-rate DSL ́ADSL ̃o[W 1 łBHDSL ͕
    ̐pgݍ킹A艺Ƃ 1.5 MBps ̑xł܂B (
    ̑x́A{gݍ킹邩ɂ܂)Bʏ҂ SOHO 
    ̑Iɂ͓܂B
   
 E VDSL
   
    Very high rate Digital Subscriber Loop ́AJ DSL ŁA肪
    52.8 Mbps ŏ肪 2.3 Mbps łBVDSL ͌_ŉ̋
    ZƂ񂪂A\ȎiƂ͂ȂĂ܂Bߏ܂Ō
    t@Co[ĂāAΓZčς߂ΎgɂȂ邩
    ܂B
   
 E UDSL
   
    Unidirectional Digital Subscriber Loop ́A[bpŒĂꂽK
    iłA܂pĂ܂B
   
 E G.SHDSL
   
    G.SHDSL ́AłA܂Ȃ\łB炭艓
    ̋ɑΉAx_ɂȂƂ@\Ȃ
    Ǝv܂B
   
 

6.2. DSLAM

̋ZṕADSLAM(Digital Subscriber Loop Access Multiplexer)dbǂ
ꂽꏊɂ܂ɔzuꂽƂŁA\ɂȂ܂B 
Alcatel <http://www.alcatel.com>  Cisco <http://www.cisco.com/warp/
public/cc/pd/si/6000/prodlit/c6160_ds.htm> Ă܂B DSLAM 
́AlXȌ`傫ADSL ڑ钆ł 1 Gōȍ\v
fłB̕idbɃ[UfŐڑƁA
fW^ڑm܂BʓIɋǑł ATM ̓t[[
ɂȂĂ܂BDSLAM ͐M`lƃf[^`lɕ܂
B͓dbЂ̃lbg[N`Af[^ ISP(ʂ)ɓ`
܂B

} 4: T^I DSL ڑoH -->

 Voice -+                                               +---> Voice 
        |<-- copper loop --> DSLAM/CO <--{ATM cloud}--->|
 modem -+                       |                       +---> Inet
        |                       |                       |
 ether..|..... DSL/ATM here ....|.... raw ATM here .....|.. TCP/IP ..
        |                                               |
 SOHO...|............ telco (ILEC or CLEC) .............|.. ISP ..| NSP
 
   

 

6.2.1. 

DSLAM ւ̐ڑǍDɓ삷邱Ƃ""ƌ܂BĂ̓
f LED ŊmFł܂BȂ΁AN܂Bf̓v
oC_Oɐݒ肵̒lœxm܂B̐l
"ōxl"̓voC_肵A񋟂T[rXë
ł܂Bf"ōxl"荂lœ邩܂
AvoC_I"ōxl"ɂ܂őx𗎂Ƃ܂B
 ADSL ͗_Iɂ͏ 8 Mbps ܂ŏo܂Ȃx̌邱
͂ł܂\AvoC_ 8 Mbps ̃T[rX񋟂ĂȂ
ȂBẴT[rX͂܂܂B 

ĹASpeedStream  5660 fE[^ telnet gēꂽ
łB̗ႾƁAp҂́A 1.5 MbpsA 384 Kbps ̃T[r
X󂯂悤ɂȂĂ܂B 


 Command-> show dslstatus                                           
                                                                    
 --- Channel Info               ATU-R                    ATU-C      
  Current TX Rate  -           384000                  1500000      
  Previous TX Rate -                0                        0      
  CRC Block Length -                -                        -      
  Interleave Delay -                -                        -      
                                                                    
 --- Physical Layer Info        ATU-R                    ATU-C      
  Current Attainable Rate -    448433                  3890243      
  Current SNR Margin      -      10.5                     17.0      
  Current Attenuation     -      54.5                     31.5      
  Current Output Power    -       3.0                     16.0      
  Current Status:                                                   
   Defects detected       -        No                       No      
   Loss of Framing        -   No Loss                  No Loss      
   Loss of Signal         -   No Loss                  No Loss      
   Loss of Power          -   No Loss                  No Loss      
   Loss of Signal Quality -   No Loss                  No Loss      
                                                                    
 --- ATU-R Line Status                                              
  Line Coding - DMT                                                 
  Line Type   - Fast or Interleaved                                 
                                                                    
 Command->                                                          


܂ŏɒڂ_́A"ATU-C" ̗ɂ "Current Attainable Rate" 
B̓f DSLAM lS[VG[Vʂ̉̓x
Bł 3.5 Mbps ƂɂȂĂ܂BAۂ̑x͐
A 1.5 MbpsA 384 Kbps ɂȂĂ邱ƂA̍ŏ "TX
Rate" 킩܂B͂̐ڑ̗_IȐɂȂ܂B̐
"ōxl"́ADSLAM ɂĐݒłAɂĂƓ
lɍs܂Bŏ̗ɂ "TX Rate " voC_w肵
Ⴂꍇ́AڑŖ肪Ă邱ƂĂ܂B炭
ɂ̂A炩̉̏Qɂ̂łB

\ȓxƂ́A̗vgݍ킹ʂłBvƂ́A
DSLAM ւ̉⌚O̔z̕iA̋KiȂlXȉ
̗v܂BɂāAۂɑł錻IȃX[v
bǵA܂xɈˑƂĂł傤BL̗ł
x͒ႭA500 Kbps Ƃl̐ڑ̍őlƂȂĂ܂Bp
 1.5 Mbps ̃T[rXɂ𕥂ĂĂłB  

ɒڂ_́AX[vbg ISP ̃lbg[NɂˑĂ_
B̏㗬̃voC_ɂˑĂ܂B 10 ` 20 % xl
bg[NɂI[o[wbhŎĂ܂BL̗łڑ 1.5
Mbps ɐĂAۂ̌Iȍő̃X[vbǵAI[o[wb
hl 1.2 ` 1.3 Mbps ɂȂƎv܂B̏xłC^[
lbgɂƐڑȂAX[vbgɉe^v܂
񂠂邽߂ɁA܂ŏƂʂɂȂĂ܂܂Bߕ
ׂŖZT[oɑ΂ẮADSL ڑɑ낤ƒxȂĂ܂
܂B  

 

6.3. DSL f

ڑ̖[ɂ̓f݂܂Bf́AΐoRœdbЂ̏I
[ł DSLAM ɒڐڑĂāAł͕ǂɂWbNɑ}Ă
܂B܂s΁Af DSLAM  ""A ISP  IP ڑ
ăC^[lbgڑJn܂I 

Linux [UɂƂăf͑؂ȌޗłI ISP 񋟂󂯂郂
f̑ Linux ł͗pł܂BOtŃC[Tlbg̃C^tF
[X郂f(̓fƃ[^[gݍ킳ꂽ)m
@łBR͑ɑIׂ郂f̑ (PCI  USBAI{[h^Cv)
́AhCo߂łIC[Tlbgx[X̃f͂܂
܂(f̃ZNVɂŐV̌݊̂郂f̈ꗗ\Ă
)B

C[Tlbg^CṽfŁAB̖݊肪Ƃ΁A̓l
bg[NJ[h(NIC)łB(ۂɌ݊̂ NIC ȂȂ삵
\ 100 Mbps ͂܂Kv܂) PCI  USB ^Cṽf͖
낢NȂ̂ŁA NIC ̕܂sƎv܂B
voC_݊̂郂fIvVƂĒ񋟂ĂȂꍇ
ÃvoC_ɓ邩AT[hp[eB̌݊iwȂ΂
܂B 

̂ƂO܂BXpeed <http://www.xpeed.com> ́A2 ނ
PCI fɃJ[lgݍ݃hCo(2.2.18 p)pӂĂ܂B
fGȂƂłBAlcatel <http://www.alcateldsl.com>  ADSL SpeedTouch
USB fɂ Linux p̃hCoo܂BDiamond ͓ PCI f
pɃoCî݂łhCopӂ܂BLgĂ͂
BEfficient Networks <http://www.efficient.com> ́ASpeedStream
3060  3061 Ƃ PCI f Linux phCo삵ĂƂ
܂Bf ATM J[hǉāA ATM ڑł悤
łBmł͕čł̃VXe͎gĂ܂̂ŁA
\ȑIƂ͍lׂł͂܂B܂ɂ̓J[l 2.4
KvƂȂ܂B 

ۂɍłgĂ郂f̃^Cv́A"ubW"ƃfg
ݍ킹̂łBubW͒PȃfoCXŁAʂ͂قƂǐݒ肪
܂Blbg[ÑgtBbŃAATM C[Tlbg̃u
bW֑oɖŗ܂BfƃubWڑĂC^
tF[X(ʂ NIC)JƂɂȂ܂B

ISP ̒ɂ"[^["pӂĂƂ܂B{Iɂ̓f
ƃ[^[̑gݍ킹ŁANAT 𗘗pł܂B܂|[gEtH[fB
OłAnuĂƂ@\sĂꍇ
邩܂Bׂ͂ĊOt^CvȂ̂ŁA܂삷
łB炭 Linux [Uɂ͂܂֌W͂ȂƎv܂BƂ
̂ Linux ͂̋@\荂xɎł邩łBǗ
 Linux }V́At@CA[EH[Q[gEFCAvNVƂđ
z@\Ă邩łI 

̂̓I[ECE^CṽfoCXłBubWƃ[
^[ƃfgݍ킹̂"u[^["ƌĂ΂邱Ƃ܂B
̏ꍇAf̓ubWE[h⃋[^[E[hƂĐݒ肷邱
\ɂȂĂ܂\ɗ͖łB 

voC_ׂ͂āAނ̃f𗘗p\ƂĂ͂łBISP
̑́A1 ވȏ̃fIvVƂėpӂĂ܂Bɂ͒
ŃfnĂƂ܂B̃f񋟂
ƂAƍ@\ŗDꂽʂ̋@ɑ΂āAp𐿋
܂BISP 񋟂郂f̑͒ʏ̗ʌoHŔ̔Ă
܂BōwƎvȂAÐĩAEgbg(Ƃ΁A
ebay)𓖂邩AISP T|[gĂȂf(肪ĂT|[g
͉Ȃł傤)w邱ƂɂȂł傤B

ISP ̒ɂ͒ʏ̗ʌoHł͗pӂłȂf񋟂ĂƂ낪
܂ADSL fŐɏĂ鐻Ǝ҂͂񂠂܂B
̂悤ȋƎ҂͑IƂȂ肦Dꂽi𔄂oĂ܂BĂ
@\啝ɋĂĂ܂Bł Alcatel  IntelAZyxelACisco
A3ComA Cayman 琻ioĂ܂Bi̓f◘pł@\ɂ
܂A US $100 zƂ납 $800 ƂƂłBF
JvZ(DHCP  PPPoE )Ă̂قƂǂłB

ǂ̃f̂ł傤HȒPɌƁAû͂܂vB
xƂ_ł́Afɂ͂قǗvƂȂ̂܂B
AƂΐff@\⃂fƃ[^[̑gݍ킹Ȃǂ̋@\s
݂̂͑܂BC[TlbgEf͈ʓIɂ͐M̂ƍl
Ă܂BIRQ ̐ݒɖ肪AhCõoOō邱
͂قƂǂ܂B Linux [UC[Tlbgfɒǂ
̂́AꌩsKł͍KȂƂȂ̂łBɂ̂͂
̂ł傤HقƂǂV߂邽߂ɁA[J[⃂fr
[mȎтcOȂ炠܂BƁAÂOt̃C
[Tlbgfł܂͂AƂƂł\voC_ DSL Ƀ}
b`ĂÃT[rXɐݒ肵Ă邩łBԈĂ邱
肦̂YȂłB 


                              Warning                               

T[hp[eB̃f⃋[^[wꍇ́ADSL voC_Ƅ
݊ƂĂ邱ƂKmFĂBW[ ADSL̕ 
́A2 (CAP  DMTBʖ Alcatel ݊)AIP ̃JvZO
̑I܂B܂X DSL(SDSL  IDSL )ɂ́A 
ꂼƎ̃fKvƂȂ܂BvoC_͌݊ïꗗpӄ
Ă͂łB܂A ISP ̃T[rXɉݒȂ 
ȂȂꍇ邩܂BǂɂĂfȂł܂
Ƃ͎vȂł(ہAvoC_xĂȂƂ)B  

 

6.4. ISP Ƃ̐ڑ

f DSLAM ɐڑĂāADSLAM ͓dbЂ ATM lbg[N(
̓t[[)ɐڑĂ܂BISP ͂̒n_Őڑ܂B
traceroute ōŏ̃zbvƂĕ\n_ ISP ̂悤łB̒n_
܂łׂ OK Ȃ͓dbЂ DSL voC_̊ǊƂȂ܂
BISP ͓dbЂ ATM lbg[NgčɃf[^ڑsĂ
Bʏ ATM  DS3 (45 Mbps)邢 OC-3 (155 Mbps)𗘗pĂ܂B
ő؂Ȃ̂́AISP ͐ڑ邽߂ɓdbЂ"_ "Kv
ƂƂłBISP ͂܂ōsĂT[rXłdq[ DNS
Anews 񋟂̂ɁAڑ 2 XebvKvƂ܂\voC
_ DSL ڑƂvoC_̃C^[lbgڑł\
 1 ɂȂĂ邩܂񂪁B 

čׂ̂Ă Baby Bell(RBOC)́AISP ƖsĂ܂B񎩕
 DSLAM ɐڑAC^[lbgڑT[rXdbЂ̎qЂł
 ISP gĒ񋟂Ă܂BƗn ISP ̑́AILEC  DSL T[r
X𗘗pĂāA܂ƂAILEC  DSL T[rX"Z["ɂȂ
Ă܂BՂƂȂCtlŁA1 Јȏ ISP  1 ̓dbǂ
ʓIɗpĂ܂B҂ɂƂẮA@\≿i̖ʂőIłA
D܂ƂƎv܂B 

ݕčsɂāACLEC(independent telco) ͎ DSLAM ݒu
Ă܂B ILEC Ɛ^狣Ă邱ƂӖ܂B
؏ƓdbǓ 2 (͂ȏ) DSL voC_
邱ƂɂȂAꂼꎩ DSLAM A邱ƂɂȂ܂
B ISP ̗ɕGɂADSL voC_͂ꂼꕡ ISP
"g" 邱ƂɂȂ܂B^ǂ΁AFXȃv≿ǐnI
ׂł傤B 

čsł͓ił܂BƗn͂ǂndbЂ̏
Ƃ̐킢ɎlꔪꂵĂ܂BƗnŐcƂ́AK͂
rWlXnCGhȏ҂ڋqƂă^[QbgiĂĂ܂B
̓RXgXɂ܂A葽̗v҂ł͂
Bɕi߂镪ł́B

ʏ̓T[rX_ ISP ƌсADSL voC_Ƃ͌т܂B͎
ۂ DSL 񋟂ĂƂ낪"q"ɂȂĂ邱ƂӖ܂Bꍇ
ɂĕς邱Ƃ肦܂BƂ̂ DSL voC_ ISP ̗
ɑ΂ĕʁXɌ_ԂƂɂȂ邩ȂłB 

t^̃Xg Linux ɍDӓI ISP QƂĂB

 

6.5. AxCreB(p)

DSL 𗘗pł̂͒Nł傤H܂KvȂ̂́AdbЂ[Ű
ӂ̂ǂɃn[hEFAݒuĂ邱ƂłBʏ͓dbǂɂȂ܂
Bdbǂ̑I̗]n̓[Uɂ͂܂\ɗĂǂ
I[Ă邩ɂ܂Bdbǂ DSLAM AɕKvȋ@ނ
ADSL 𗘗pł\oĂƂɂȂ܂B"Oi"Ƃ
Xebv𓥂ŃT[rX󂯂悤ɂȂ܂B 

悢"u[(ʖ DSLAM)"ݒuAƂ̂Ƃœdbǂ͂
΂Ƃꂵւ肪Ă܂BdbǂƂ͈̋x OK ɂȂΐ
vƂ͂Ȃ܂B

 

6.5.1. \

T[rX\ޑOɁÃvoC_Z܂̒nΏۂɂĂ
`FbNĂBdbЂ DSL voC_ ISP 
̃IvV𒲂ׂĂBK͂Ȓn ISP K͂ȓdbЂƓ
lɃIvV񋟂Ă邩܂BЂƂѐ\ނ
voC_T[rX񋟂ł邩ǂ̔FƂ҂ŁAT[r
X񋟂F߂܂B 

 

6.5.2. iF

̒nŗp\ȂƂ΁A͉"iF"łBvoC
_͗lXȃeXgsāADSL ̐Mɏ邩ǂmF܂B
̃eXgŉ DSL ǂ̒xpł邩𔻒肵A[U͂ǂ̃T[
rX𗘗p̂KȂ̂킩܂BԂ񂱂ɌT[rX
\ނƂɂȂƎv܂B̃eXǵAlXȃeXggݍ킹
čŝŁAȂ荞ݓĂ܂Bi" "ƍlv
͂񂠂܂Bł傫͋łB  

DSL ׂ͂ċƂ܂BADSL ͖ 18,000 tB[g(5.5 km)
̉EłAۂ̓voC_ɂĂ܂܂łBΉ
قǐM͎キȂAڑi\傫Ȃ܂BADSL Ɋւ
ẮA 1.5 Mbps ߂̑x𓾂悤ƎvȂA 12,000 tB[g(3.7
km)ȓɂȂƌ̂܂\ׂ̏ēȂBIDSL
͂艓܂ŉ\ɂȂ܂A IDSL ̍ő呬xA艺Ƃ
144 Kbps ƂႢxłB 

[ɋ߂łA̕i\̂v͂񂠂܂B
\IȏQv́A׃RCƃubWE^bvłB͂܂
̓dbƂCtɂƂĂ͌ʓIȂ̂ƌȂĂ܂AV
fW^ZpɂƂẮAז̂ɂȂĂ܂B̂悤Ȏvʏ
QɂԂ邩AԂȂ͂قƂǉ^łBt@Co
ǂrɂĂi͉܂BvoC_͉""
Ƃ邩܂Bǂ̒x܂ŉĂ̂́AvoC_ɂ
Ă܂܂łA܂ɐݒu܂ł̉ߒɗ]ȎԂł
B 

̕i"Ȃ"ƂȂÃXebv͏ɍv
߂邱ƂłBvoC_͂̉ňMǂ̂炢̂ɂ
āAv낢pӂĂƎv܂B肬̂Ƃɋ
Aȃv͓K؂ł͂Ȃł傤BCɂȂȂAiK
Ă闿̌nł傤Bᑬȃv͗̕ႢłB
̗̌n̒iK̕tAvoC_Ƃɂ܂܂łBDSL ͐V
T[rXȂ̂ŁAvoC_͓KȗƋ@\̑gݍ킹͍Ă
܂B̑gݍ킹Ń[Ȗ唼AŗDʂɗĂ邩
łB  

ʏ̃f[^]x͉L̒ʂłB

        
    /
   
      128 Kbps/128 Kbps
          
      256 Kbps/256 Kbps 
          
      384 Kbps/128 Kbps 
          
      640 Kbps/90  Kbps
          
      1.5 Mbps/384 Kbps 
          
      2.0 Mbps/512 Kbps
          
      7.1 Mbps/1024 Kbps
   
      
   
̑ɂAȂgݍ킹܂Bxオقǃv̗
ς̂ʓIłB 

̕iɖ肪ĂAɂI̗]nȂȂI
܂傤BK؂ȉ̒vZ邱Ƃ́AȉȊwƂ͂ƂĂ
܂B܂ɂԈႢ荞ޗ]n߂邩łB܂vo
C_̒ɂ́A ""ƂŁA艓ɑΉƂ
܂B܂A 2 {ȏ̓dbĂāA1 {ʖڂȂA
ĂBƂ̂Aǂ̏ł͏I[Ă܂A
ŕKdbǂ瓯ł邱ƂĂ킯ł͂Ȃ
łIdbЂ̃lbg[N͉Ăsvcł͂Ȃ̂łB  

 

6.6. voC_I

2 ȏ̑IׂȂ̂ŁAł̓voC_̃T[rXr
ꍇɋC_Ă܂BlnɂȂ
ȂI邩܂B̉\͌ł͋ɂ߂č
󋵂łB킹ĊoĂė~̂́Aڑɂ 2 XebvƂ
ƂłB DSL voC_ ISP ̂ƂłBꂼIԂƂ
Ȃł傤B 

 E ݊̂郂fBLinux(͂̑ OS) ɂČ΁A
    {̓C[TlbgEC^tF[XƂłB (O͂܂ł)
    "[^["(Ƃ΃fƃ[^[̑gݍ킹) ׂ͂ẴC^t
    F[XC[TlbgEfoCXłΖ肠܂B
   
 E ݒuBŐݒuȂNɂ点Đڑ񊄈
    BŐݒûF߂ĂȂƂA Linux 
    TCgvoC_ݒ肵ĂƎv܂H߂ł傤I
    e| Windows  Mac pӂĂ̂łBbvgb
    vł[ł傤B
   
 E IP AhXÓIIBT[o𗧂ĂAƎhC
    Ă肵ꍇ́AÓIȃAhXĂBœ
    I IP ́AC^[lbg"Ȃ"悤ɂ邱Ƃ
    Ȁ󋵂ɒӂ𕥂̂ȂƂƂ킩͂ł
    B
   
 E JvZBڑ́A"ubW"  "PPP" ɂȂ܂BPPPoX ͐ڑ
    肵ĂƂ͌悤ŁA"펞ڑ"Ƃ͌ȂĂ܂
    BPPPoE ̓NCAgE\tgEFAKvŁAŐڑێ
    ̂ŁAɕCKvłB
   
 E T[õ|VBISP ̒ɂ͂ȂI[vȂƂ܂A
    ȂT[o֎~ĂƂ낪悤ł\ꂪl Web T
    CgłB̃|[gubNĂƂ낳܂B
   
 E KBK񂪂āAKᔽƂȂ̂ł傤HLZ
    H
   
 E ڑ̐B"펞ڑ"(ȂƂ_Iɂ :-)Ă܂HZb
    VAChE^Cɐ͂܂񂩁Hɗp
    шvāÂ炢ƐĂ܂񂩁H LAN ɂȂ
    ڑ֎~Ă܂(ȂI)H
   
 E Linux ̃T|[gBISP ̂ꕔł́A炩̌` Linux T|[g
    Ă܂AقƂǂ̂Ƃ͑ΏۊOłBISP T|[gȂ OS
    𓮂ĂƂRŁAǂȃT|[gfAƂɒ[Ȃ
    Ȃ́A͂قǈȂ󋵂ł("T|[gĂ"
    Ƃ̂́A"eNjJET|[g" AƂ̂Ƌ߂Ӗł)
    BISP "CɂȂ"ƌĂȂAĂ܂Ă܂Ȃ͂
    łB
   
 E ̃_CAbvEAJEgBڑ_EꍇɁAꂪ
    Ə܂BłȂƕʂȏꏊdq[`FbNȂ
    ȂȂłB
   
 E ݒp̃vOBISP ̒ɂ́A킸łݒp̃vO
    pӂĂƂ낪܂B̓AJEgݒ肷邽߁A
    ͂߂ĐڑɎgp܂BLinux ł͂炭܂
    (BellAtlantic.net ƂƂT|[gƂ񍐂)BȊO
    DSL ɂ͌ŗL̂̂֘AvgR͉܂B
   
 E T[rX̐MƕiBnœvoC_ ISP ɂāA
    ĂBn LUG ͂̎̏𓾂ɂ܂ƂȂƂł
    Bǂ̂炢̃_EE^C邩(ȂΗǂ)Hdq[
    news T[rX͉KHobN{[̌oH́HeNjJET|[g
    Hy󒐁FLUG  Linux Users Group ̗̂łz
   
̑ɂ̃IvV@\܂Bɒl邩
܂B IP AhXAhC̃zXeBO(DNS)A
Web Xy[XAdq[̃AJEg񎝂ĂAWeb [B
ꂱlĂ݂ƁAmɗǂvقǃRXgĂ̂ł傤
B

 

7. t^: FAQ

DSL  Linux ɂĂ FAQ B

 1. Q. DSL  Linux Ŏg邩H
   
    DSL ̓eNmW[ 1 łBƐmɌƁÅ֘Ae
    NmW[̏W܂łB̎ Linux œdb͎g܂HƎ
    悤Ȃ̂łBeNmW[̂͐Sz܂BȂ̂ŁAȒP
    ɌĂ܂"  OK łI"BڂȂAQ
    Ƃ΁A͂܂ɃvoC_̂łBLinux ݒ肵ē
    삳̂ɓāAvoC_ł邱Ƃ邩܂B
    ͕KvȏɍƂȂ܂B݊f̑IȂ
    Ƃ̂́A悭鍢 1 łB܂dbЂ ISP 
    sꍇɂ́AWindows  Mac gėp\ɂ܂B̂
    ŗlXȑ OS ɂĂ̋eNjJET|[g֍sRXg
    Ȃ܂Bw鎞͒ӂĂI
   
    {I DSL ׂ͂āAyɍȃC^[lbgڑ܂B
    DSL łׂ͂ TCP/IP g܂B Linux  TCP/IP 
    ܂B
   
 2. Q. PCI( USB)f̃hCo͂ǂɂH
   
    ԈႢȂقƂǕs\łBƂ̂́A{ɗpłȂ
    BԖړIɂȂxXgȑÍAOtŃC[TlbgEC^
    tF[XtfłBvoC_̂񋟂Ă
    ȂȂÃvoC_{AȐӔCŃfwĂ
    B̃fvoC_񋟂Ă^Cv DSL ƌ݊
    邱ƂmFĂB
   
    O͉ɂł܂BfEZNVŁAĂ鎞_
    ŗpł݊f̈ꗗĂB
   
    ݊̂ȂfčĂ܂ȂA]
    ɂāA[J[ɂ₳Ƃł܂ ;-)B
   
    ̏󋵂ς邩܂B Xpeed <http://www.xpeed.com> 
    PCI ł IDSL  SDSL fp̃J[lp\[X܂ރhCoo
    ܂BȂƑf炵I Alcatel <http://www.alcateldsl.com> 
    AAlcatel  SpeedTouch USB ADSL fp̃hCoŋ߂ɂȂă
    [XĂ܂B̃[J[ɏ]Ă邱Ƃ҂܂
    (K̃hLg̍ŐVłǂłBKvɉĂ̏
    XVłB
   
 3. Q. ǂ̂炢ōiȃlbg[NJ[hKvH
   
    Linux ݊̃J[hł΁AǂłKɓ܂B[GhȃJ
    [hł 10 Mbps ł邱ƁA_ňʏҌ DSL ͂
    x߂ł邱ƂYȂłBƂĂ͂Ȃ̕i
    J[hE߂܂B΃G[⏉sǂN闦Ⴍ
    ̂ɖ𗧂łB
   
 4. Q. ǂ玩̒n DSL pł悤ɂȂ̂킩邩H
   
    DSL AǂŒ񋟂邩́An̓dbЂɂ܂邵
    ܂BRxɂׂẴ[UΏۂɂł܂̂ŁA炭
    ԂȂnIł̂ł傤B܂A̋^ɑ΂ēd
    bЂ璼ڕԓ炤͍̂ł傤BƂ̂A
    ɑ΂Ď݂̓Ȃł傤BɂłAĂ
    邩ǂ͂킩܂B
   
 5. Q. ܂ɗĂ̂ŕiǂȂBłH
   
    ܂߂ȘbAzł傤Hi񂠂킯ł͂܂
    B̃voC_ȂAIĂBƂ
    ܂񂪁B̒ƌvł܂̂ŁAԈႦ\
    ܂B̖ړÎ߂Ƀf[^x[X𗘗pĂƂ낪
    ̂łA悭邱Ƃłf[^x[Xɂ͊ԈႢ܂Bv
    oC_̒ɂiŌڋqT|[gĉ𐮔Ƃ
    B܂A藣ꂽnւ̃T[rX\ȃ[GhT[rX
    ĂƂ܂BƂȂ̒nłpł
    ܂B́AdbЂɋڋqɑ΂āAfoC
    X[gݒ肵ĂƂ邩܂B
   
 6. Q. Linux őx͂ǂ̂H
   
    KvȂƎv܂BLinux ł͂łɑ啔œKĂ܂B
    Windows ̂o[Ŵ悤ɃptH[}Xシ̂ɃWX
    gnbNKvȂǂ܂Bڑx傫ꍇ́ATCP
    Receive Window 𑝂₵Ă݂ƗǂȂ邩܂B`[jO
    EZNVĂB
   
    ƉԂlāAptH[}XoĂȂƊmM
    A̖肪̂ł͂Ȃł傤Bڂ́AguV
    [eBOĂBׂƂ́AœKł͂ȂA{̌`
    ɖ߂ƂłB
   
 7. Q. T[rX̏640K(Ƃ)ɂȂĂBȃf
    ΑȂ̂HƂɉ̂H
   
    ܂܂Bf͐ڑɂ̂ɂقƂǖ֌Wł
    BvoC_̓C^[lbgɂȂỎ̂ǂɁAx
    邵݂Ă܂B𖳌ɂ@͂܂B
   
 8. Q. Ƀ_E[hAbv[hł̂H݂ɉeo
    ̂H
   
    Ɖ̌oH DSL M̒œƗgтgpĂ܂B
    ďƉ𓯎ɍsĂ͂ȂApłш敝
    HƂ͕ʂ肦܂B
   
    sȉeƂ΁A ADSL ̂悤ȔΏ̂ DSL Ə
    肪ɈtɂȂĂ܂ꍇłB TCP ́uvł
    ADSL Ɍ킯ł͂܂B̏ꍇ͍ɂȂ΂Ȃ
    ǈeyڂ܂(܂艺̂)Bǂ̂炢eł̂
    ܂ɗvāÃhLg͈̔͂zĂ܂B
    AƏ̍傫قǉe傫Ȃ܂(Ƃ΁A肪
    640Kbps ŁA肪 90 Kbps ̏ꍇ)B
   
 9. Q. 768 Kbps ̃T[rX_񂵂Ă邪AǂĂ 640 Kbps 
    oȂBŔHT[rX̓Ĥ͓̂B
   
    낢ȃvgR𗘗p邱ƂŁAx 10 ` 20 % xቺ
    ܂BĂ 20 % ߂ł傤B͔ȂłB
    ̂炢̂́A̗vݍĂāAvoC
    _ɂĂقȂ܂B̂Ƃ̂ɖĂ΁Aōxɋ߂
    悤Ɍł傤B܂_񏑂̍בǂ߂΁AISP ̑L
    Ă鑬x" "ƂȂƂɂȂĂ̂킩ł傤
    BT[rX_`FbNĉۏ؂Ă邩ĂBۏ
    ƂĂ`̍ő呬x肩Ȃ߂ŁAۂ̃X
    [vbgł͂ȂAxx[X̒lł傤B
   
    ܂xeXgɂӂĂBeXgTC
    g̒ɂ́AȂ蓖ĂɂȂȂƂ낪܂BȂƂ̃TC
    g̊Ԃɂ̓X[vbgɉe^AʂȂv
    ܂\ǂ̂炢̐lɓeXg悤ƂĂ邩ق
    ǂ킩܂BeXgƂĈԗǂ̂́AǂӖŗLȁA
    Ȃ߂̃TCg FTP Ń_E[h邱ƂłB
   
10. Q. Ȃ PPPoX ȂɈ̂H
   
    ̒ňԑ̂ 1 ɁAڑXؒfƂ̂
    ܂B PPP ͐ڑɋN邠Qɑ΂ĉe󂯂₷ƌ
    ȂĂ܂BʓIɂ͐ؒfƐV IP AhXU܂
    BĂ͂܂ PPP ƌ䂦ŁA"펞ڑ"̃v
    gRƂӖł͂܂BPPP ͖{̓ZbVǗ̃vg
    RłA[UڑAF؂悤߂܂B
    PPPoE  PPPoA ͂ǂ܂قǌ͂ꂽvgRł͂܂
    BقǗjт܂BdbЂ⃁[J[QĂĐɏo
    Ƃl܂B PPPoE ͐ڑێ̂ɁAɒǉ̃\t
    gEFAKvƂ܂B͂ɕKvɂȂAQv
    ܂邱ƂɂȂ܂B܂AڑǗ̂ɃI[o[wbh
    ܂B
   
11. Q. Ȃ PPPoX Ȃ̂H͂悭ȂƎvI
   
    PPP ɂ̓voC_ɂƂčDsȓ_܂B̃C
    tn[hEFAA܂ڋqx[XōL͂ɎgĂ_CAb
    v݂̂płƂ_łB[U̔F؂⍼̂鎖ԂR
    g[̂eՂłB܂lbg[N֘AǗ̂ȒP
    łBہAǂ̓voC_yȕɂȂĂ܂܂ByɂȂ
    Al⎞ԂߖłAꂪRXg̍팸ɂȂ܂(ȂƂvo
    C_炵Ă݂)B
   
     IP AhX̌͊hłwr[E[Uւ̌点
    ܂BIP AhX̃RXǵAŜ̏󋵂炷΍ׂȂ
    łB
   
12. Q. ̒nŗB̃voC_ Linux T|[gĂȂBǂ
    炢̂H Windows gȂ΂Ȃ̂H
   
    IŌ"T|[g"Ƃ"eNjJET|[g "s悤
    T|[gӖ܂B肪Ȃ炻̎ɂ́AZpIȃT|[
    g͂łȂAƌłB̂Ƃ͔ނ̃lbg[N
    Linux gȂƂƂӖĂ̂ł͂܂B
    ȂAŉƂȂ΂ȂAƂƂȂ̂ł
    B֎~̂Ȃ炻́ApK(AUP)T[rX(TOS)_
    ɋLڂĂł傤B
   
    eNjJT|[g⌻nƈAЂ̃|VāA"Linux 
    ̃T[rXł͎g܂"ƌ̂𕷂Ƃ܂BNT T[o
    ɂĂlȂƂ悤łB͂Ă̏ꍇA
    lIɊԈ߂ʂłB
   
    \voC_ Linux T|[gĂȂȂALinux ɐݒ
    {̂͂߂炤ł傤BƂs킷߂ɁA
    ŐݒsIvV邩܂BP[XoCP[X
    B
   
13. Q. FAX \tgEFA DSL fł͂܂ȂBȂH
   
    FAX ͕ʁAAiOdbg FAX @葤 FAX @Ƀ_C
    ē`Ă܂BAiOf͂s܂ADSL"f
     "̓_C@\܂B56K f܂ĂȂ
    I
   
14. Q. "FastPath"ĉH́HHC^[[uƂ́H ping ɂ
    鎞Ԃ𑬂ɂ́H
   
    C^[uƂ DMT ̉̋@\łB{Iɂ DSLAM 
    肷邱ƂŃG[̂ƂłBڑxȂAx
    傫ȂƂeł܂BFastPath(̓mEC^[u
    ƌ܂)  DMT gƃQ[gEFCւ ping  10 ` 25 ms 
    ͈͂Ɏ܂܂BC^[u 40 ` 75 ms ͈̔͋ߕӂɂȂ܂
    B̓C^[uLɂ͈͂ɂĈقȂ܂B
   
    _ƂẮA肬̏Ԃɂ肵AC^[uɂ
    ăG[oɂȂƂ_łBdbЂ̑́AC^[u
    ftHgōsĂAx߂Ă܂B͓K؂ȂƂ
    悤Ɏv܂B͌Eɋ߂ł͌ʂ܂A
    ȂׂĒxƂdׂ𕉂Ă邱ƂɂȂ܂BdbЂ̂
    ɂ́A̋@\Lɂ薳ɂ肷钲_ɂĂ
    Ƃ邩܂B܂P[Xɂ܂B
   
15. Q. DSL 𗘗p̂ɂǂ̂̃p[Rs[^KvH
    ISP ͏ȂƂ Pentium 200 ͕KvƌĂ邪AȂH
   
    {Iɂ 386 ł܂܂BĂ̏ꍇAC[TlbgEx
    [XŃlbg[NɐڑĂƎv܂BȂ̂ŁAƂĂxC[
    Tlbgڑł̂ł΁A_Iɂ͂ǂł DSL ͓삷
    łB Netscape  386 œAƂƂɂĂ̓Rg
     ;-) ڑꎩ̂ێɂ́A386 ŏ[łB
    ۂł邱ƂƂ͂܂ʂ̖łB
   
    ̌ŎXGɂĂ̂́Af ISP vĂN
    CAǧłBPCI  USB ^Cṽf͂ǂhCoKv
    ƂĂāAꂪ CPU ܂ރVXẽ\[X܂B
    APPPoE ̏A CPU ׂ܂BWindows ͂
    _ׂĂɂĂقǌIłȂXɂ܂̂ŁAISP ̂
    ̓~bhW Pentium vꍇ悤łB
   
    Linux ȂAȂ悤ƂĂ邱ƂɂĂ܂B[G
    h Pentium łẴ[UȂ[Ȃ͂łB386  486 
    t@CA[EH[Q[gEFCƂĊҒʂɓ͂łBY
    Ȃł炢̂ PPPoE 𓮂ĂȂA[Ghȃn[hE
    FAŃptH[}X𓾂\邱ƂłB
   
16. Q. DSL 𓱓Œ̑xłȂAڑ؂ꂽ肷B
    Ȃ̂H
   
    ꂾł͏񂪑܂BڑꍇA{ɑ̌
    肦܂BׂĂƁAƂłȂʂɂȂ܂B
   
    DSL ̌_ 1 ɁAMȂ낢_܂BMɈe
    ^vAꂪڑ⑬xȂʂɂ܂B
    ̔znň̊𖞂ĂȂAO̖(ڍ
    ĂƂ)ARFI lXȔ炫ĂA߂
    ̃WIǂ AM WIM̉e󂯂AɃubWE
    ^bvADSLAM 炠܂ɂĂ蓙XBf
    NICAdbЂ DSLAM ̃n[hEFA̖񂠂܂B
    𐮗̂͊ȒPł͂܂B
   
    voC_̓[U菕ĉł͂łB܂AvoC_
    łȂōs Linux ̐ݒɖ肪ƂmFĂ
    B͂ȂȂAS苭p炤ƂȂ񂪂
    sĂBĂ̖͉ł܂BRc͖𕪗
    ƂłBdbЂ̒ŃeNjJET|[gDĂƂ́A
    DSL ɂĒbĂāAẑ܂Ȗ肷ׂĂo
    ܂B
   
17. Q. voC_̃eNjJET|[g͉mȂBǂ΂
    H
   
    悭łB̐l̐iɂ̂ł͂Ȃł傤B܂Ad
    bɂeNjJET|[ǵAS҃xȂ̂ŁAĂ͋Zp
    ͂lbg[N̒mقƂǂȂႢl߂Ă܂Bd
    ̂Ƃ߂āA܂܂傤B
   
18. Q: ADSL ̕WƂ́H
   
    Q: ܂BThe U.S. Bell Operating Companies ́Aŋ
    Discrete Multi-Tone(DMT)  ANT(ANSI T1.413) WƔ\
    Bč̑ DMT ͂ɏ͂łB ANT ƂŖ
    ̂́A Carrier-less Amplitude Phase Modulation(CAP) łB
    񗼕ɂ͌݊͂܂B
   
    WɊւ DMT ̗px_[̎_猩̔r
    ́A http://www.aware.com Ō邱Ƃł܂BoCAX
    ܂A̘bɂčłڍׂȏ񋟂Ă܂B
   
    ANSI ̋Ki̎ʂ͍łÂƂɒ邱Ƃł܂
    B American National Standards Institute ANSI Home Page <http://
    www.ansi.org>
   
    Asymmetric Digital Subscriber Loop (ADSL) Metallic Interface
   
    ANSI TI.413-1995
   
    ӁF ANSI TI.413 2 ł 1997 N 9  26 ɔ܂B
   
19. Q: DSL  ATM ڑł邩H
   
    ZpIɂ͉\łBDSL f̒ɂ(ȂƂ Alcatel o[W
    )PCI  ATM J[hɂȂ ATM Forum 25Mbps C^tF[X
    Ă܂BۂȂ̂͂Ȃ荢łB http://
    lrcwww.epfl.ch/linux-atm/ ɏڍׂ܂B
   
20. Q: Ȃ DSL ɂ͂낢ȑx̎(384/1.5/7.1M/20M )̂
    H
   
    {IȖ́AΓ̉ 100 NO̐݌vɂƂÂĂ邩
    łBAiOdbŎgɂ͉͂܂񂪁AfW^M
    𗬂ɂ͂ւȍƂȂ܂BȂقǃf
    [^]x邱ƂYȂłBœKZpɂ
    āAʂ̓fW^M܂悤ɂȂ܂AׂẴA
    vP[Vɑ΂Ĉ肵ш敝񋟂ł܂񂵁AƂĂ
    (18,000 tB[g(5.5 km)ȏ)ȂȂłB`ɂlX
    ш敝́A@x_[Ȏsꋣ𔽉fĂāAdbЂf
    [^x̑gݍ킹W悤ƖNɂȂĂ܂B܂Ƃ
    dbЂ́Aʏ҂ɂł邾WJ邱ƂڕWɂĂ܂
    B
   
    ̎ǂłBƂ̂̏Q́AlXȉx
    𐶂ݏo 1 łB
   
21. Q: ubWE^bvA׃RCADLC ̂悤ȉQƁAADSL
    gpłȂ̂ł傤H(Bruce Ediger Ɋӂ܂)
   
    Q: ׃RĆAdbł̉`g̓`コ
    CCEC_N^XłB{IɁAugpv
    g̃GlM[gɗ^܂BƂĂdb(9000 tB[
    g(2.7 km)ȏ) ̏ꍇɂ悭p܂B
   
    PɁuubWvƂꍇɂ́AubWE^bvӖ邱ƂƂ
    ܂BÂdbĂnł́Adb̔z͉ 1 {
    ̊ňĂ܂B񂻂̏Z̏Z͈Ⴂ܂
    łBzĂȂꍇ́AȂ"ubWE^bv"gĊ
    ɐڑĂzĂ܂܂B
   
    fW^E[vELAF 2 c̐ 1 {ŕ̉̓`ł
    邢낢ȃVXe܂B̃VXe͎gpg
    AfW^AԂR[hȂɂēdb
    𕪊邱Ƃł܂ByAEQCƌĂ΂邱ƂƎv
    ܂B
   
    L̋@ނ́Ag𗘗pf[^]ɗlXȈe^܂B
   
    ׃RĆAgSɃtB^OAgʂ܂
    B܂uxGx[vvƌĂ΂邠g𑼂̎gɗD悳
    Ď󂯎邵݂ύXĂ悤łB܂肠鉹f[^
    Aɗׂf[^WQ\܂B
   
    ubWE^bv́AM̔gꍇ̓VgELpV^X
    Ƃē삵Aĝ悻 1/4 ̏ꍇ͑шʉ߃tB^Ƃē삵
    ܂B܂肠̎gRɒʉ߂邱ƂɂȂ܂BDMT
    f̓̉M͕Ă܂AM̃fɓBł
    AʓIɓdb̑ш߂Ă܂܂B
   
    yAEQĆAŕ̓`𓯎ɍs߂ɁA̓`
    gш𐧌܂B̓AiOMɂfW^MɂKp
    ܂BDMT ɂ`Ŏgg̓yAEQCɂătB
    ^Ă܂܂B
   
    uҐɂMƓ`@̎v(Whitham D. Reeve 
    A IEEE Press 1992, ISBN 0-87942-274-2) ́Adbɂ`
    ɑ΂ĉ̒AubWE^bv^e̒@
    W听łAȂ荂łB
   
22. Q. DSL ڑ Web T[o^pł邩H
   
    łBTCP/IP lbg[NɐڑłĂ̂łA_I
    ɂ̓vgR\dq[ ftpAsshAirc \Ă΁Aǂ
    ȃT[rXł\łB肪Ƃ ISP  TOS(Terms of
    Service) ݂ł傤B ISP ̒ɂ́A̓_ɊւĂȂI[v
    ȂƂ܂ÂƂ͂ǂȃT[o֎~ĂāA
    ̃|[gubNĂƂ낳悤łB̓_͒
    ׂŁAvgޑO ISP ɕĂׂłBʏҌ
    T[rX񋟂Ă ISP ͑K͂ȃT[oǂF߂悤Ƃ܂
    B{ɌlŃgtBbN̒ႢT[rXłBꂪ
    ړIɂȂĂȂ΁AñrWlX DSL voC_𒲂ׂ
    BRXg͗]vɂ܂AT[rXۏ؏Lш
    KvƂ̂Ƀ}b`Ă̂ʂƎv܂B
   
    Œ IP ĂȂ΁A_Ci~bN DNS T[rX̂ǂꂩ𗘗p
    Č̂łB_Ci~bN DNS ́A̖ړIɂ܂ɂĂ
    łBNEZNVĂB
   
23. Q: ADSL fɂĂ̎́H
   
    A: ܂B̋Zp̔B͓iŁAHOWTO ł͒ǂ
    B http://dslreports.com/information/equiprated/all āA
    `FbNĂB
   
    L̃Xg 2001 N 5 ݂Ŕ̔Ă郂fłBɒf肪
    Ȃ΁ADMT (ʖ Alcatel ݊)g ADSL fł(
     1998 N 6 ̂܂܂̂̂܂)B
   
      10  100 baseT C[TlbgEC^tF[XfE[
        ^[
       
        : Flowpoint 2000 DSL(CAP)A3COM Viper-DSL (CAP)AWestell
        ATU-R-Flexcap (CAP)AAware x200AZyxel P641AEfficient Networks
        SpeedStream 5660ACayman 3220HACisco 673 (SDSL)ACisco 675
        (ADSL/CAP)A Cisco 677 (ADSL/DMT)AAlcatel SpeedTouch Pro
       
      10  100 baseT C[TlbgEC^tF[XubWE
        [^[
       
        : Alcatel 1000AAlcatel SpeedTouch Home( USB  PCI ^C
        v SpeedTouch )AWestell ATU-R-Flexcap2 (CAP)AEfficient
        Networks SpeedStream 5260AEfficient Networks SpeedStream 5251
        (SDSL)A Westell WireSpeed.
       
      ATMF C^tF[Xf
       
        : Alcatel 1000AAlcatel SpeedTouch HomeACisco 677 (DMT)A
        Ariel Horizon II
       
      V.35 VAEC^tF[XubWEf(T1AVA
        [^)
       
        : Westell ATU-R
       
      USB C^tF[Xf
       
        Efficient Networks SpeedStream 4060, Intel 3100, Alcatel
        SpeedTouch USB
       
      PCI f
       
        : Cisco 605AEfficient Networks SpeedStream 3060/3061AIntel
        2100A Xpeed X200 (IDSL)AXpeed X300 (SDSL)AAlcatel SpeedTouch
        PCI
       
      f(IEEE 802.11b)
       
        : Alcatel SpeedTouch Wireless
       
      10  100 baseT C[TlbgEC^tF[Xp[^
        [(f)
       
        : Netgear RT311ASMC 7004BRALinksys BEFSR11
       
Iׂ܂ł̂ŁAۏ؍ς݂̐iꗗƌȂ
͂ł܂B͗pł鐻i΂Ꭶɉ߂܂
B


                              Warning                               

f̐Ǝ҂́AISP Ɏdl킹ďoׂĂꍇX
܂B ISP ̈˗ŁA@\LEɂĂ܂B炭 
l邾̃oG[Vefɂ̂ł͂ȂƎv܂
BÂŔȂlɓĂĂB                        

 

8. t^F̑

8.1. NW

 E Linux Documentation Project ɂ邻̑֘AhLg
   
      Firewall HOWTO <http://www.linuxdoc.org/HOWTO/
        Firewall-HOWTO.html>
       
      Security HOWTO <http://www.linuxdoc.org/HOWTO/
        Security-HOWTO.html>
       
      IPCHAINS HOWTO <http://www.linuxdoc.org/HOWTO/
        IPCHAINS-HOWTO.html>
       
      IP Masquerade HOWTO <http://www.linuxdoc.org/HOWTO/
        IP-Masquerade-HOWTO.html>
       
      Home Network mini HOWTO <http://www.linuxdoc.org/HOWTO/mini/
        Home-Network-mini-HOWTO.html>
       
      Ethernet HOWTO <http://www.linuxdoc.org/HOWTO/
        Ethernet-HOWTO.html> y󒐁F{́A JF <http://
        www.linux.or.jp/JF/JFdocs/Ethernet-HOWTO.html> ɂ܂z
       
      Networking Overview HOWTO <http://www.linuxdoc.org/HOWTO/
        Networking-Overview-HOWTO.html>
       
      Net HOWTO <http://www.linuxdoc.org/HOWTO/Net-HOWTO/>, ȑO
        NET3-4-HOWTO ƖÂĂ܂ALinux lbg[ÑgsbN
        ɂẴKChƂāAłMĐ[@艺̂ł
        B
       
      Linux 2.4 Advanced Routing HOWTO <http://www.linuxdoc.org/HOWTO
        /Adv-Routing-HOWTO.html>BVKɏ낵̂ŁAJ[l
        2.4 ɂȂĉPꂽ@\Ă܂B
       
      DHCP HOWTO <http://www.linuxdoc.org/HOWTO/mini/DHCP/> y󒐁F
        {́A JF <http://www.linux.or.jp/JF/JFdocs/DHCP> ɂ
        ܂z
       
      VPN HOWTO <http://www.linuxdoc.org/HOWTO/VPN-HOWTO.html> y
        F{́A JF <http://www.linux.or.jp/JF/JFdocs/
        VPN-HOWTO.html> ɂ܂z
       
      VPN Masquerading HOWTO <http://www.linuxdoc.org/HOWTO/
        VPN-Masquerade-HOWTO.html>
       
 E  The Netfilter Project(http://netfilter.samba.org/)ɂJ[
    l 2.4 ̃pPbgEtB^O܂BJ[l 2.4 ̐V@
    \ɂėDꂽ HOWTO ܂B
   
 E ZLeBɂĂǂ̃|[gJĂ̂𒲂ׂɂ́A 
    http://hackerwhacker.com/ ĂB́A̓_ɂėD
    ꂽTCg 1 łBeXg̒ɂ́A킸ȃ|[g
    ׂȂ̂܂B
   
 E SuSE Linux PPPoE TCg http://www.suse.de/~bk/
    PPPoE-project.html. łBLinux ŗpł PPPoE ̎قƂǂ
    āAɗ񂪂܂B
   
 E Bob Carrick ̍łM PPPoE TCg http://
    www.carricksolutions.com/ ɂ܂Bނ Linux PPPoE ̃TCǵA
    http://www.carricksolutions.com/linuxpppoe.htm łB DSL ֘A
    ̏܂BOS ׂĂJo[Ă܂B
   
 E NTS EnterNet  Linux  FAQ  http://http://
    support.efficient.com/KB/NTS/linux.html <http://
    support.efficient.com/KB/NTS/linux.html> ɂ܂B GPL 
    Ȃ PPPoE NCAgŁAISP ̒ɂ͂zzĂƂ
    ܂B
   
 E PPPoE ɂĂ̋Zpyт̗_IwiɂẴzCgEy[p[
     Redback 瓾܂B http://www.redback.com/ <http://
    www.redback.com/en-US/frameset.jsp?flash=true&javascript=true&page=
    home/home.html>B ISP  PPPoE ǂ̂悤ɌĂ邩
    ̂łB
   
 E ATM on Linux: http://lrcwww.epfl.ch/linux-atm/ <http://
    lrcwww.epfl.ch/linux-atm/>B PPPoA  ATM ڑɂĂ̍ŐV̏
    ܂B
   
 E Linux  ATM ̂̂𗘗p񍐂𒅎ɍsĂ̂Ahttp://
    linux.com.sg/news/atm/ łB
   
 E FreeSwanAhttp://www.freeswan.org  Linux  IPSec  IKE VPN ̎
    sĂƂłB
   
 E Linux ł VPN ƃ}XJ[fBÓAhttp://www.wolfenet.com/
    ~jhardin/ip_masq_vpn.html ɂ܂B
   
 E PPTP-linux  PPTP T[o Linux gĐڑł܂Bz[Ey
    [ẂA http://cag.lcs.mit.edu/~cananian/Projects/PPTP/ ɂ܂
    B
   
 E Justin Beech  http://dslreports.com  DSL ֘Aԗf
    TCgłB̃TCgɂ͂ȂĂA烊NĂ
    ܂(̃TCg Linux ŉ^cĂ܂)B
   
 E John Navas ̃P[uf DSL ̃TCg http://
    cable-dsl.home.att.net łBׂĂ OS ΏۂɈʓIȏ񂩂`
    [jOAguV[eBOAn[hEFA񓙂܂B
   
 E TCP ̃ptH[}XE`[jÕRc: http://www.psc.edu/
    networking/perf_tune.html <http://www.psc.edu/networking/
    perf_tune.html>BLinux ܂߂ OS ̏񂪂܂B
   
 E Linux ̃ZLeBTCgőf炵Ƃ́A http://
    linux-firewall-tools.com/linux/ <http://linux-firewall-tools.com/
    linux/> łBLinux Firewalls ̒҂ł Robert L. Ziegler 
    ̂̏񂪂܂B̃ZLeB֘ÃTCgւ̃N
    ܂B
   
 E http://www.securityportal.com/lasg/ <http://www.securityportal.com/
    lasg/> ́AKurt Seifried ɂ Linux ŃVXeǗsl
    ̃ZLeBKChłBlXȕ̃gsbNɂẴ`[g
    AƂėDĂ܂\t@C[EH[ł͂ȂAIȓW
    ]܂B
   
 E Seattle firewall  ipchains x[X̃t@CA[EH[ŁAp̃}
    XJ[fBO^Cṽt@CA[EH[@(LRP Linux Router
    Project ܂)łB@\ȃ}XJ[hEQ[gEFC̓T[
    oŁAX^hA Linux VXełB̃vWFNg http:
    //seawall.sourceforge.net/ <http://seawall.sourceforge.net/> ɂ
    ܂B -->
   
 E  ipchains ̃XNvǵA http://personal.bellsouth.net/
    ~hburgiss/linux/ipchains.html <http://personal.bellsouth.net/
    ~hburgiss/linux/ipchains.html> ɂ܂B IP }XJ[fB
    Oݒς݂ŁAKvOȕ̓RgAEgĂ܂B󋵂
    ďXC΂ɂg̃XNvgƂċNłƎv
    ܂B
   
 E ̃voC_ Linux ɓTCg܂ (
    Kɗp̂ɗpĂ΂悩̂)B
   
      Verizon: http://www.panix.com/~dfoster/prog/linux/pppoe.html
        <http://www.panix.com/~dfoster/prog/linux/pppoe.html>
       
      Southwestern Bell: http://home.swbell.net/sdboyd56/DSL/
        connect1.html <http://home.swbell.net/sdboyd56/DSL/
        connect1.html>
       
      BellSouth: http://personal.bellsouth.net/~hburgiss/dsl/survival
        /linux.htm <http://personal.bellsouth.net/~hburgiss/dsl/
        survival/linux.htm>
       
      HomeChoice (UK): http://www.maxuk.net/hc/faq.htmlB(sv
        c ADSL T[rXł)
       
      France Tlcom's Netissimo: http://www.rhapsodyk.net/adsl/HOWTO
        /BAlcatel ̃f Linux g PPTP ݒ肷̂ɖɗ
        񂪂܂B
       
      I[XgA̍C^[lbgڑ Linux  HOWTO: http://
        www.members.aon.at/heimo.schoen/at-highspeed-howto.html.
       
 E 펞ڑȏ́AOzXg悤ɂȂ肽܂
    񂩁H_Ci~bN DNS T[rX IP AhXXƕςƂ
    AO\ɂ܂Bɂ̂́Apł鐔X̃T[
    rX̂łB
   
      http://dyndns.org
       
      http://tzo.com
       
      http://easydns.com <http://www.easydns.com>
       
      http://no-ip.com
       
      http://www.microtech.co.gg/dns
       
 E ADSL Deployment 'round the World <http://conk.com/world/dsl/> ́A
    voC_AiAxɂĊȃXg\̒n͊ԈႢ
    悤ł\񋟂Ă܂B
   
 E comp.dcom.xdsl FAQ <http://homepage.interaccess.com/~jkristof/
    xdsl-faq.txt>BpɂɍXVA DSL ZpɂẴt@X
    ƂėDĂ܂B
   
 E comp.dcom.xdsl <news://comp.dcom.xdsl>  Usenet  DSL ɂċc
    _AJ炵At[N肷ƂłBISP
    ȂZpIȎɑ΂Ẳ𓾂̂ɓK؂łB
   
 

8.2. p

̃hLgƓdbЋy DSL ƊEŎgĂp̉łB

ADSL
   
    Asymmetric Digital Subscriber LoopBΏ̃fW^ҐB"Ώ
    "Ƃ́Ȃx葬ƂӖBADSL  1 {̂
     POTS ƋLBő呬x́A8 Mbps Aʂ̓voC_
    āAxxɂȂĂBł͍ły DSL
    B
   
ANT
   
    ADSL Network Termination ADSL lbg[NI[u(ADSL f)B
   
ARP
   
    Address Resolution ProtocolBMAC AhX IP AhXɕϊB
   
ASAM
   
    Alcatel  DSLAM wpB
   
ATM
   
    Asynchronous Transfer Mode 񓯊][h\ɃpPbg̃XCb
    `OsƂɂāA 155 Mbps  2Gbps(ł)̑x
    BC^[lbgւ̃obN{[ڑ̂߂ɗpĂB
    ܂dbЂ͉̑f[^`ĂBdbЂ DSL lb
    g[NɂƂ ATM ̓gX|[gw̃vgRƂĈʓIB
   
ATMF-25Mbps
   
    ATM tH[F̃C^[tF[X\25Mbps ̑xoAPCIoX
     NIC ŎgpĂBf PC ԂŎgpC^[tF[X
     1 B
   
u[^(brouter)
   
    ubW̓[^[Ƃē삷ݒ肪\ DSL fB
   
CAP
   
    Carrierless Amplitude PhaseBADSL Ǝ̕ZpŁA"DMT" 
    Ă(Ă)BDMT WBCAP  DMT f
    ݊ȂB
   
Central Office  CO
   
    ǁB 2 ̈ӖA1) db֘A@킪ݒuĂdb
    ̌B 2) db̃_CEg[o͂鉹@B"CO" ƌĂ
    邱ƂBʂ DSL Ă DSLAM  CO ɐݒu邪
    AꂽƂɕUĐݒu悤ɂ܂܂ȂĂĂB
   
CLEC
   
    Competitive Local Exchange CarrierBILEC ""BƎ̉
    ؎AT[rX񋟂̂ ILEC ؂Ȃ΂Ȃ
    B
   
CPE
   
    Customer Premises Equipment(ڋq[)\dbЂ̗pŁAڋqL
    @ނӖB (܂肠ȂɊǗ̐ӔC)BCSU  DSUA
    fAFAXAdbɓB
   
DHCP
   
    Dynamic Host Configuration Protocol\ IP AhX₻̑lbg[
    Nŏdvȃp^𓮓IɊ蓖Ăۂɗp IP vgRB
    DHCP T[óANCAg̗vɑ΂ĎŊǗĂ IP
    "݂o "BIɑ݂oAhXXVBubWĂ
     DSL P[uf̃lbg[Nł͈ʓIȃvgRB
   
DMT
   
    Discrete Multitone TechnologyBADSL ֘AŕyĂ
    A݂ł͕WƂȂĂB"Alcatel ݊"ƌĂ΂ꍇB
    ̓dbЂ̑͌ DMT WƂĂB̑ł܂ʓI
    łȂ̂ "CAP" BCAP  DMT f͌݊ȂB
   
DS0
   
    dbЂ񋟂{fW^\ 56kbps  64kbps 
    BAiO`l 1 {T|[gB
   
DSLAM
   
    Digital Subscriber Loop Access Multiplexer fW^Ґd
    u\dbГݒu@ŁADSL WdBΓ
    ̈ DSLAM ɁA̓fɂȂĂBDSLAM  DSL
    삷ŖĂ͂ȂȂBfoCX͓@\ł菬^ɂȂ
    ĂADSL ̗p͈͂L邽߂ɗꂽꏊɕUĐݒu
    悤ɂȂĂĂB
   
DSL
   
    Digital Subscriber LoopBfW^Ґ\ DSL T[rX̑̂ŁA
    ADSLA SDSLAIDSLARADSLAHDSLAVDSLASHDSL ȂǂɓB
    ȃC^[lbgڑB
   
G.DMT
   
    Ώ̂"ڈt̑x"o ADSLBCAP x[X̂̂ G.Lite ʂ
    ̂ɎgBڂ DSL ̒ԂQƂ̂ƁB
   
G.Lite
   
    ōxႢAił ADSL wBXvb^tB^sv
    BDMT ݊ł͂ȂBڂDSL ̒ԂQƂ̂ƁB
   
HDSL
   
    High bit rate DSLBڂDSL ̒ԂQƂ̂ƁB
   
ILEC
   
    Incumbent Local Exchange CarrierBЂŉۗLĂndb
    ЁB Bell Atlantic  Pacific Bell ɓBFCC(Federal
    Communications CommissionBAMʐMψ) ILEC Ƀlbg[N
    ƗnvoC_ɊJ悤K肵ĂB̂Ƃ Covad 
    Rhythms ƂƗnT[rX񋟂ł悤ɂȂĂB
    A͏҂ɂƂėǂƂłB
   
C^[rO
   
    C^[rÓADMT ^Cv ADSL̉Œ\ȗvf
    1 B]rbgu݂ɔzuv銄𐧌䂷̂ɕs
    AG[@ƂĎgBC^[u΂قǉn
    ̈萫͑邪AɒxB
   
IP
   
    Internet ProtocolBIP AhXwꍇɂ悭gpB
   
ISP
   
    Internet Service ProviderB肵펞ڑɂ ISP {IȃC
    ^[lbgT[rXƐڑmۂĂ邱ƂKvƂȂB
   
LAN
   
    Local Area NetworkBRs[^̃lbg[N 1 ŁAWAN(Wide
    Area NetworkB܂C^[lbg)ƗĂBvCx[g
    Oւ̌oHȂ IP AhX𗘗pꍇBƂ
    192.168.1.1  10.0.0.1 ̂悤ȃAhX𗘗pB
   

   
    2 c̃cCXgyAdbǂAڋqŏI[ĂBDSL 
    ƂẮA"̖"KvB
   
MAC AhX
   
    Media Access Control AddressB"n[hEFA"AhXƂAlb
    g[NfoCXӂɕ\Blbg[N̓_猩ĂdvB
   
mini-RAM
   
    Remote Access Multiplexer ƌADSLAM ̏^ŁBʏ͂ق̂킸
    Ȑڑ\ 8 ʁ\\BCO 痣ꂽnŎgpB
   
MTU
   
    Maximum Transmission UnitBlbg[N]łőpPbgTC
    YoCgZŕ\́BMTU 傫ȃpPbǵAȃpP
    bgɕĂ]B
   
NAT
   
    Network Address Translation ̈Ӗ́ALAN ɐڑĂRs[
    ^Q WAN ɃANZXł悤ɐݒ肳ꂽzXg̃AhX"x
     (}XJ[fBO)" WAN ւ̐ڑ邱ƁBLinux ł
     "IP }XJ[fBO"ƌĂłBJĂ郋[eB
    O\ȃAhX 1 LꍇɎgpBLAN ̃zXg̓}X
    J[fBOsvNV WAN Ƃ͔ΑɂAvCx[g
    WAN փ[eBOłȂAhXĂB
   
NID
   
    Network Interface DeviceBdbЂڋqɐݒu@Bdb
    ƌڋq̐ӔC_B"SNI"  "TNI"A"ONI" ̓Ƃꍇ
    B
   
NIC
   
    Network Interface CardBlbg[NEC^[tF[X񋟂 PC
    J[hBʏ 10baseT  100BaseTAATMF-25Mbps J[hgB
   
NSP
   
    Network Service ProviderBISP ̏ʃvoC_obN{[
    voC_B
   
OC-3
   
    P[ug 155 Mbps ̑ш敝B
   
POTS
   
    Plain Old Telephone ServiceBAiOdb̃T[rX(܂
    db)B
   
PPPoA
   
    PPPoATM  Point-to-Point Protocol over ATM (RFC 2364)BPPP
    vgR 1 ŁADSL gĂ ISP ЂgĂB܂
    ɃfoCXŗLȃhCoKvB܂ApłIvV
    PPPoA ȂAfƃ[^[̌^g͑I 1 ɂȂB
   
PPPoE
   
    Point-to-Point Protocol over Ethernet (RFC 2516)BvoC_gp
    Ă 1  PPP vgRBL͂ɎgĂāALinux
    NCAgBNWQƂ̂ƁB
   
PPPoX
   
    PPPoE  PPPoA ̑́B
   
RADSL
   
    Rate Adaptive DSLBDSL ̒ԂQƂ̂ƁB
   
RBOC
   
    Regional Bell Operating CompanyB"Baby Bells" ƂBč̓db
    Ђ AT&T ̂ĈȗẢЂ̓ƐԂɂB
   
RFI
   
    Radio Frequency InterferenceBDSL ͂M̎g傤 DSL
    gpĂшɂAߐڂ͈͂ɂ肷Ɖe
    ₷BRFI  DSL M𗐂ǍʕiቺBcOȂ
     DSL ͔ɉe󂯂₷gœ삵Ă悤B
   
RWIN
   
    uReceive Windowv̗Bʖ TCP Receive WindowBTCP lbg[N
    ̃X^bN̈Ƃđ傫\B
   
SDSL
   
    Single Line DSL  "Symmetric DSL"ƂBڂ́ADSL 
    ԂQƁB
   
SNI
   
    Subscriber Network InterfaceBdbЂ̗pŌڋqɂdbz
    wBdbБƉ̋En_BDemarcation Point Ƃ
    B" NID"ƌĂ΂邱ƂB
   
Splitter
   
    NID ̑ɂ󓮑fq([pXEtB^) DSL Mƃf[^
    `lɕBtB^O DSL POTS Lꍇ
    ɕK{łB
   
Splitterless
   
    DSL ̐ݒuۂɃXvb^KvƂȂBڑ̂
    RJ11 tB^(}CNEtB^Ƃ)AiOdb DSL ł
    Ȃ̑̃foCXgpĂdbWbNׂĂɎt
    B NID ł͂ȂAWbN̂Ƃ DSL ̐MtB^
    OBᑬȏꍇ͕KtB^KvȂ킯ł͂ȂBtB
    ^Xvb^Ȃ΁ADSL ̐M͓db̉Ɉe^A
    G𔭐P[XBG.Lite ̓Xvb^tB^sv
    AOłB
   
SOHO
   
    Small Office HOme
   
x
   
    DSL fƓdbЂ DSLAM lS[VGCVČ܂鑬xB
    ̒l͗_IȍōxłAlbg[NvgR̃I[o[wb
    h͉lĂȂB̃X[vbg̓f̓x
    ꍇʗB
   
T-DSL
   
    German Telekom ɂ ADSL ̎Bڍׂ DSL ̒ԂQƁB
   
T1
   
    ʖ DS1BfW^pŁA24 `l𑩂˂ 1.544 Mbps B
    (24 { DS0Ƃ)f[^]ɎgpB
   
T3
   
    ʖ DS3BT1 ̏ʋKi 44.736 Mbps B(672 { DS0 
     28 { DS1 Ƃ)f[^]ɎgpB
   
VPI/VCI
   
    VPI  "Virtual PATH Identifier" ̗ŁAATM ̃Zwb_̈ꕔw
    BVCI  "Virtual Circuit Identifier" ̗ŁA͂ ATM ̃Zw
    b_̈ꕔŁA܂łBZpIɌƁA[gVPI
     VCI(RVPIARVCI)݂B҂Ƃ ATM lbg[N (ꂪ
    ʂ̂Ȃ)ɐڑĂ郂f⃋[^[ɂƂďdvȐݒł
    BvoC_gpĂ̂ɍ킹KvB VPI  VCI
    ̑gݍ킹́A0/32  0/35A8/35 悭gB
   
VDSL
   
    Very high bit rate DSLBڍׂ DSL ̒ԂQƁB
   
VoD
   
    Video on Demand.
   
VoDSL
   
    Voice over DSL.
   
WAN
   
    Wide Area NetworkBLJĂlbg[NBƂ΁AC^[
    lbgɓB
   
xDSL
   
    悤ȋZpɎxꂽ DSL ̒ԂwBADSL  SDSLAIDSL 
    B
   
 

8.3. ̑̈ʏҌT[rX

8.3.1. P[uf vs DSL

dbЂ DSL ƃP[uerЂ̃P[uf͋֌Wɂƌ
ȂĂ܂BR͗ݒu\݂Ŏ悤ȏ񋟂Ă邩
łBP[uf 10 ` 30 Mbps Ƃш敝oƂĂ
Ȃ̃[ULē]sĂ܂B
AptH[}X肷Ƃ͌Am[hɂ鑼̂
̃[UgpƖcȃgtBbNĂ܂܂B 

DSL ̔́AC^[lbgɃvCx[gȌoHp̑шŒʂ
ƂƂǂɂ܂B͂قƂǍbłBDSLAM ɑ΂
͎łADSLAM ͓dbЂ ATM(̓t[[)ɂ
A͑шL܂B DSL voC_ ISP Ƀlb
g[N܂Ǘ邩ɂĂ܂BDSL voC_ ISP ́AP
[uЂŜƂđш܂ǗĂƂƂňv
Ă悤łBj[Yɂ킹ėeՂɑш𑝂₵蒲ł
B̃[UɉgĂĂxω邱Ƃ͂قƂ
܂BA̓lbg[Nш敝ɂ܂Ǘ邩
ɂĂ܂B  

DSL ͂܂ZLeBʂłbg܂BP[uf̃l
bg[ŃAK͂̑傫 LAN ̂悤ȍ\̏ꍇقƂǂłBڑ
(ш敝)Ă邻̏ꏊ炷łɋLĂ܂BĊO
ĂڑtB^ĂȂ΁AГɉł傤B

܂P[uer DSL  ISP ̑I悤
Ɏv܂BȂƂčł͊ԈႢ܂BIƂ͑f炵
ŁAꂪɌт܂BP[uer ISP  1 
܂BCɓȂ΁AłIłBDSL ȂÃI
vVn̒nPʂɂ낢Ƒ݂Ă܂Bčk̂悤
ȐlnȂ炽̃IvVƎv܂B

ǂǂ炪̂ł傤HႢ́AZpƂɂƂ
łB񂹂΁A҂Ƃɂ낢닰낵ȘbƎv
B܂AKȐl̘bƎv܂BɂƂăxX
gȂ͉̂Ȃ̂m@́AnɏZޑ̃[ǓoɊ
ÂāArĕF邱ƂłB1 l̃IvVőIĂ͂
܂B͓vIɑÓł͂܂B܂ÃT[rX
̒ZԂpĂȂlӌŔfĂ܂Ă͂܂
BJԂ܂AvIɉlقƂǂ܂B낤ƂĂ
T[rXƂ܂̂𗘗pĂl̈ӌW߂Ă
B

 

8.3.2. ɂt@Co(IFITL  FTTC  FTTH)

nɂẮAVɈzėlɑ΂Ă܂ł̂Γɕ
ČP[u~݂ĂƂ낪܂Bt@Co DSL T[r
XɂƂďQƂȂ͖̂炩łAt@Coꎩ̂ɂ͏IɃ
bg܂B̌t@Co 100 Mbps ł\͂A
ŃAbvO[hɂłȒPɂłƎvłB

AdbЂ̌t@Cop҂́ADSL sꂩߏoĂ(DSL
͂ΐゾ̋ZpȂ̂)AɊ҂𓾂܂BZp͊Jr
łAWJ͂߂ƂłɂAt@Coɂdb
bg܂pĂƂ܂B"FTTC"(Fiber To The Curb)
 "IFITL"(Integrated Fiber In The Loop)ŁA̋Zp͓dbЂ
񋟂ł 1 ̍T[rXłB̑xł΁AVoD (Video on
Demand)  VoDSL(Voice over DSL)͂߁Aш敝ɕKvƂT[
rXɂ[ɑΉł܂B DSL MȂƂAbg
 1 Ƃ CPE KvƂ̂̓lbg[NEJ[hƂ_
܂B܂Af͕Kv܂B NIC ǂ̃WbNɑ}
āA͊yނłI͂Ƃ΃fW^Eer̂悤ȑ̃f
W^ȃT[rXdbЂ񋟂̂F߂邱ƂɂȂ邩܂
B

FTTC  Fiber To The Curb ̗łBɈԋ߂ɂ͂ΐ
g܂BƂ͔΂ FTTH(Fiber To The Home)͑SĂt@Co
gA荂Ȑڑ񋟂܂B 

 

8.3.3. (CX)

ŋ߂ɂȂĖZpɂĂꂱb肪oĂ܂B̓u[ho
hsŊmɏꏊmۂ悤Ɍ܂BP[uerdb
̃lbg[NɃANZXłȂnɂēɂ̂悤Ɍ܂B
܂ŗL̖Ă܂B̖肪邽߂ɁA̋Zpł
߂W[ɂȂƂ͂܂BV͂܂ɖMɉe^
܂\Ƃ΁Adꂵ_ĂAJ~Ă肷
Ɖeo܂B܂AʐMqoRƂȂ̒xꍇ
܂BԂĂΉPƎv܂BɎ邩ǂ
͂킩܂B

 

8.4. ݊f

L̈ꗗɂ郂fvoC_񋟂VXéAɗp
̂łBŋ߂ Linux fBXgr[VȂA₱₵
ƂȂ삷͂łBɂ̓At@łx[^ł̃vWF
Ng̐ʂ͓Ă܂B

C[TlbgEC^tF[X

 E OtŃC[TlbgEx[X̃f₻fgݍ񂾃f
    oCXׂ͂ē삷Ǝv܂(voC_ DSL ɓK悤
    Ă)BKvɂȂ̂͌݊̂C[Tlbg̃lbg[
    NEJ[hłBꂪ]܂iłB
   
PCI(^Cv)

 E Xpeed X200 IDSL http://www.xpeed.com/Products/x200/x200_c.html (J
    [l 2.2.18 Ή)
   
 E Xpeed X300 SDSL http://www.xpeed.com/Products/x300/x300_c.html (J
    [l 2.2.18 Ή)
   
USB

 E Alcatel SpeedTouch USB (ADSL): http://www.alcatel.com/consumer/dsl/
    supuser.htm#driverB̃hCo̓J[l̃W[ƂĒ񋟂
    ĂāAJ[l 2.4 KvłB
   
 

8.5. Linux ɍDӓI ISP

"DӓI"ƂӖ́AN񂪍 OS gƂāAISP
pȂ܂ȂƂƂłB܂邱ƂɍsĂ
܂BIĂāAƂ𑊎ɂ𓾂ȂȂ
AWindows ꎞIɓ܂傤B́AݒuS҂ɎŃCX
g[(NIC )|ƂȂ`̂̂ł͂Ȃł傤B
񎩕ŃCXg[ƂIvVȂAꂪ "Linux"
ɂƂĂ͈ԓs̗ǂ@łB 

̈ꗗ̂ɓĉ肵Ƃ܂B́AISP vo
C_ĂȂ OS 𓮂ƂĂA\ȃf(C[T
lbgEC^tF[X𐔃^CvpӂĂɈႢȂƂ
A݂ĂȂƁAʓ|ȍƂȂƂłBLinux 
łݒuɂ́AvoC_ݒuIvVAsȎ舵
ȂƂKvƂȂ܂BLinux ɑ΂eNjJET|[g͊
ĂȂƂłÄꗗɂĂ͕K{ڂł͂܂
B̈ꗗ𐄑EvoC_Ƃ͂ǂȂȂłB͂Ŋ撣
ĂB܂̎s͐₦ԂȂωĂ܂̂ŁÄꗗ͂܂
͂߂̈Ƃėp悤ɂ肢܂B

̈ꗗɒǉȂALinux Friendly <mailto:hal@foobox.net?Subject
=LinuxFriendlyISP> ܂Ń[B̎ ISP ̐̂ URL
(͂肵ȂĂ)AݒnƃJ[o[ĂnAf̃^CvAT
[o[ɑ΂|VȂ֘AĂB 

SK͂ ISP(č)

 E Speakeasy.net <http://www.speakeasy.net>BŒ IP  PPPoX ͎g
    BT[o͋B]ǂBSċḰB IP pB
   
 E DirectTV DSL( Telocity) <http://www.directtvdsl.com> Œ IP 
    PPPoX ͎gȂBT[õ|V͊ɂ₩BeNjJET|[g͂
    ƂЂǂƂ񍐂BSċḰBp̃fpӂĂ邪
    AC[Tlbgx[XB
   
 E Penguinista DSL <http://www.geekcast.com/dsl_request.html>ꕗς
     DSLBLinux 𑊎ɂȂACɓĂB Benevolent
    Penguin Society X|T[BSċḰBŒ IP pB^CA
    EgƐڑ́u_Iɂ́vBvgR(ppp?)͕s
    B
   
n^ ISP(k)

 E qx.net <http://qx.net/dsl/index.html>BP^bL[BLVg
    AP^bL[B̐yђJo[B Linux T|[
    gBŒ IPBlT[oBiKIȉǐnB]ǂB
   
 E Commonwealth Technical Services <http://www.ctsi.net>Bo[WjAB
    b`hɂB Linux T|[gAǐSIBŒ IPB
    lT[oBш搧ȂB ISP ͉ Linux ŉ^pB
   
 E ExecDSL <http://www.execdsl.com>B[hB{`AɂB
    Vg DC Ƃ̎ӒnJo[BŒ IPBT[oBv
    DSL voC_̑IBZJ_ MX  DNS p\(G
    ǂ)B(ɂ Linux ̃T|[g͂Ȃ)
   
 E Netexpress.net <http://netexpress.net>BCmCB[ɂB
    iKIȗ̌nBŒ IPBɂ Linux ̃T|[g͂Ȃ
   
 E iglou.com <http://www.iglou.com>BP^bL[BLVgɂ
    B܂ȂP^bL[BCrƃInCIBVVieBɓWJ
    B܂elV[BibVrɂWJ\BŒ IP BlT
    [oBlXȃIvVpӂAiKIȗ̌nB
   
 E Bluegrass.net <http://bluegrass.net/internetaccess.html>BP^b
    L[BLVgɂA̎ӒnJo[BŒ IPBlT
    [oBiKIȗ̌nBrWlXNX DSL ̓P^bL[BC
    r̂ݗpB
   
 E Netsync.net <http://www.netsync.net/services/dedicated.html>Bj
    [[NBVg[NAn(thjAAWF[Y^EƂ̗אڒn
    ) ɂBŒ IP  PPPoA gAT[oBLinux T|[g
    ĂB
   
 E Aracnet <http://www.aracnet.com/adsl/>BVgBVAgӂ
    ISB|[ghAT[nɓWJBŒ IPBLinux g
    BiKIȗ̌nBVFEANZXEAJEgB
   
 E Drizzle.com <http://www.drizzle.com/dsl>BVgBVAg
    Jo[ĂBŒ IPBT[oB
   
 E Blarg! Online Services, Inc. <http://www.blarg.net/>BVgB
    VAgӒnJo[BŒ͓I IP gA PPPoA 
    ̓ubWɂڑBlT[o(DNS dq[͂Ȃ)
    BLinux ŉ^pĂAT|[gB
   
 E ReedMedia.net <http://www.reedmedia.net/isp/dsl/>BISB|[g
    hƂ̎ӒnJo[B܂AoN[o[AIsAA^R
    }AVAgAGobgAFmAxK (VgB)J
    o[Bf̃IvVLxBŒ IPBlT[oB
   
 E MM Internet <http://mminternet.com>BJtHjAɂBŒ
    IPBlT[oBZJ_ MX  DNS p(f炵)
   
 E Arrival.com <http://www.arrival.com/>BJtHjAɂB
    SDSL ΉBT[oB
   
 E DSLExtreme.com <http://www.dslextreme.com/>BTWFXnJ
    o[BŒ IPBlT[oB
   
 E Bell Canada's Sympatico High Speed Edition <http://www.bell.ca/en/
    ps/pers/internet/sympatico/default.asp>BPPPoE gpB
   
[bp ISP

 E Easynet Belgium <http://easynet.be>BLinux 𐳎ɃT|[g(Roaring
    Penguin)AI IPB
   
 E BaByXL Broadband DSL <http://www.babyxl.com>BI_BLinux ̓u
    bW DHCP ڑŃT|[gB
   
̑

 E   iPrimus Pty Ltd <http://www.iprimus.com.au>BI[XgÃVh
    j[ƃ{ɂAssJo[BŒ IPŕ IP p
    \B
   
 

8.6. Linux [^ƂĐݒ肷

[J̐ݒɈˑ̂ŁAɂׂ_܂Bt@CA[
EH[̐ݒ₻̑֘AݒKvłB̐ݒL̐} 5 ɍ
܂BÂ i486 }Vݒ肵āAt@CA[EH[[^[Ƃ
DSL ڑƎlbg[NԂɓĎgĂ܂B LAN ł́Av
Cx[g IP AhXgĂāALAN  WAN Ԃ̃[^[ɂ IP }X
J[fBOƃt@CA[EH[Ă܂B 

ڂ́AIP Masquerade HOWTO <http://www.linuxdoc.org/HOWTO/
IP-Masquerade-HOWTO.html>  Firewall HOWTO <http://www.linuxdoc.org/
HOWTO/Firewall-HOWTO.html> ĂBJ[l 2.4 Ȃ Linux 2.4
Advanced Routing HOWTO <http://www.linuxdoc.org/HOWTO/
Adv-Routing-HOWTO.html> ĂBLinux ͂ƂĂ_A
[eBOt@CA[EH[ɗDꂽ\𔭊܂Bŝ̃[^[
ȂłBǂŃhAXgbvɎgĂÂ 486 }V
܂񂩁B 

} 5 T^I SOHO lbg[N̐ݒ

    
 <--Private Subnet/LAN-> Linux <-----ISP's Public Subnet----><--inet-->
      192.168.1.0
 

 X--+   -------- 
    |   |      |        --------      (eth0:0)---------
    +--=| Hub/ |       | Linux  |     +------=|  DSL  |=-DSL-> ISP's
 X-----=|Switch|=-----=| System |=----+       | Modem |       Gateway
    +--=|      |  eth1 |(Router)| eth0        ---------
    |   --------    |   --------    |
 X--+               |   IP_Masq     |
                    |  IP_Firewall  |
   |                |    Gateway    |
   |                |               |
   |                V               V
   V           192.168.1.1         Dynamic or
 192.168.1.x   LAN Gateway         Static IP
LAN Addresses  IP Address          from ISP pool
                                   

 
   

ݒ肵 Linux [^[(i486 œĂ Redhat Linux 5.0) 2 
̃C[TlbgEC^tF[XĂ܂B1  ISP ̃Tulbg
āAQ[gEFCɌĂ܂(L eth0)B(L eth1)
Anu (̓XCb`Onu)ɌĂāAvCx[gAhXg
Ă LAN ɂȂĂ܂(Ƃ 192.168.1.x)BvCx[lbg
[N[^[t@CA[EH[zŊOɐڑƁAɃZL
eBサ܂BƂ̂́AO璼ڃANZXłȂȂ邩
łBLAN C^[lbgɐڑɂ́AӎIɃvCx[gAh
X}XJ[hȂ΂܂BLAN ̃zXg̓C^[lbg
Linux [^[ 2 ڂ NIC(eth1) oRăANZX܂BQ[gE
FC 2 ڂ NIC  IP AhXɐݒ肵ēlbg[Nɑ
Ɋ蓖Ă܂傤B 

ӃJ[l IP tH[fBOł悤ɂăRpCĂ
AIP tH[fBO}VŗLɂȂĂȂ΂܂B`Fb
Nɂ́ucat /proc/sys/net/ipv4/ip_forwardvƂĂBl "1"
ȂIŁA"0" ȂItłB]݂̒lt@C echo ĕύXł
B 


 # echo 1 > /proc/sys/net/ipv4/ip_forward                           
                                                                    


Linux [^[ "IP }XJ[fBO" ݒ肷Kv܂BJ[
l̃o[WňقȂĂāAipfwadm(2.0)A ipchains(2.2)Aiptables
(2.4) ƂȂĂ܂Bڍׂ͂ꂼ̃hLgĂB
āAt@CA[EH[Yꂸɐݒ肵ĂI

Linux [^[ƂĎgvWFNg܂B̃P[X
͂ĂłBI[CŁAZLeB₻̑̋@\
܂ł܂BbƐݒuݒ͔ɊȒPłBn[hEFA
ŏœ삷悤łBƂ΃tbs[hCuKvƂ
悤ɁBłLȂ̂ http://www.linuxrouter.org łB http://
www.freesco.org  http://www.coyotelinux.com ȂǂȂ邩
܂Bhttp://www.clarkconnect.org/index.html AlȃRZvgł
AWindows x[X̃[eBeBgĊĎAݒ肵肷
ɐ݌vĂ܂B

 

9. t^ Alcatel SpeedTouch USB ADSL f

 Chris Jones  <chris@black-sun.co.uk>B copyright 2001  

Hal Burgiss  <hal@foobox.net> MB

 

9.1. ͂߂

Linux g Alcatel SpeedTouch USB ADSL fݒuAݒ肵ėp


tX http://www.linuxdude.co.uk/docs/
Alcatel-Speedtouch-USB-mini-HOWTO-FR.txt ɂ܂B

 

9.1.1. ͂߂

Chris Jones  Alcatel-Speedtouch-USB-mini-HOWTO fڂĂ
炢܂BhLg̍ŐVo[W http://www.linuxdude.co.uk/
docs/Alcatel-Speedtouch-USB-mini-HOWTO/ ɂ܂B

Linux 𗘗pƂāA@͂낢날܂B̃hLgł
[LOEfƂ̂܂B̕@܂AAlcatel
zzĂCXg[̎葱Ƃ́AƂ邩
܂Bӂׂ܂BAlcatel ̃hCo PPPoE 
PPPoA ƂT|[gĂ܂BAlcatel ɂ PPPoE ̕ȒP
Ă܂A삷܂łɑ邱Ƃ܂Bł PPPoA ̕
肵ĂƑ̕Ă܂B HOWTO ł PPPoA ̃hC
oԗ܂BAlcatel zzĂhLgɂ PPPoE hC
oɂđ񂪍ڂĂ܂B

܂̃hCo 2001 N 3 Ƀ[Xꂽ΂łB܂I
R[hcĂ܂BC[TlbgfgꍇƓɈ肵Ă
Ƃ͍lȂłB[U[J҂ɃtB[hobN
Ă΁A_͂͂łB

hCo̓J[l 2.4.x KvƂ܂BJ[l 2.2 𓮂Ă
Ao[WAbvɂȂł傤BJ[l̂ł͂ȂAmodutils
̂悤Ȋ֘ApbP[Wo[Wグ邱ƂɂȂ܂BKvȂ
ƃJ[l 2.4 ̃\[Xc[ɂ /usr/src/linux/Documentation/
Changes ǂ߂ΕKvȂƂׂĂĂ܂Bɕt΁A
f̃J[l 2.4 ̃VXeɓāA蓮삵ɉL̍Ƃ
ĂB


                              Warning                               

̍Ƃ͉aȐlł͂܂BS҃[U̓C[Tlbgf
ЂƂĂB                                      

 

9.1.2. wi

Alcatel SpeedTouch USB ADSL f͒ቿiŔ؂łBADSL T[rX
LΉĂāAɃCMX BT Ignite(British Telecom  1 )
̃f ADSL lbg[NŗpĂ܂BBT ͂܂
V ADSL [^ɈڍsvĂ܂Ãf͈ˑR
Ẵ[U[\ Windows  Linux ŃC^[lbgɐڑ
ƎvĂ\gĂ܂B

͂߂̂Ãf Windows 2000  Windows 98 gĂ郆[
UłAAlcatel ͍ŋ߂ɂȂ MacOS p̃hCo[XA
̊ Linux p̃hCo[X܂B

̃hLgł́ASpeedTouch USB g Linux ŃC^[lbg
@ł邾₳܂B

 

9.1.3. O

̃hLgɂ͑O܂B

 1. Red Hat 7.0(̃fBXgr[VłقƂǓł)g
    Ă邱ƁBŐVłĂ邱ƁB
   
 2. J[l 2.4.2 𓮂Ă邱(J[l̃CXg[ɂĂ
    ̃hLg͓Kł͂܂BWeb TCgɂׂĂ܂B
   
 3. CMXɂ邱(ADSL lbg[NŃANZXł̂͂
    ̂ŁAmĂ邱Ƃ͂łׂĂłB̍ƉႤ_
    ȂAdq[B̃hLgC܂)B
   
ŏ̑ÓAPɎ Linux ł̃fgȂ΂Ȃ
߂ɁARed Hat 7.0 gĂƂłB̃fBXgr[V
Jo[ƎvĂ܂BႢȂAdq[
B̃hLgC܂B

2 Ԗڂ̉͂ƏdvłBŒłJ[l 2.4.1 𓮂ĂȂ
΁u܂vB 2.4.2 ̕ƈ肵Ă܂A SpeedTouch
USB hCoǍDɓ삵܂B

 

9.1.4. 

cOȂ\tgEFȂ啔͐ݒɂĂ͂܂x[^łȂ̂ŁAN
bVAȂt[Y肷邩Ă܂BhCo
΁AҒʂɈ萫āA݂ȂKɂȂ܂B

 

9.2. J[lɃpb`𓖂Ă

̃ZNVł͉L̂̂KvɂȂ܂(ǂł鎞ɂ̓o[
WςĂ邩܂̂ŁAKXǂݑւĂ)B

 1. J[l 2.4.2 ̃\[Xc[(ʂ /usr/src/linux/ ɂ܂)B
    ܂łɂ̃J[l삵Ă邱ƁBJ[l 2.4 CXg[
    @́A Web TCgɂ܂B
   
 2. Jens Axboe  pppoatm J[lpb`KvɂȂ܂BL̂Ƃ
    납ł܂B
   
    http://www.kernel.org/pub/linux/kernel/people/axboe/PPPoATM/       
    2.4.1-pre7/pppoatm-1.gz <http://www.kernel.org/pub/linux/kernel/   
    people/axboe/PPPoATM/2.4.1-pre7/pppoatm-1.gz>                      
   
    ꂩpb`oɂ́Agzip -d pppoatm-1.gz Ƃ܂B
   
 3. X SpeedTouch hCoƃhCoˑĂ SAR Cu
    ĂJ[lpb`gĂ܂AcOȂƂɂ̃p
    b`̓eiXĂȂ߁ÃhCoƍȂ
    Ă܂BƂ킯ŁAXȑOGɂȂĂ܂
    B
   
    ݎgpĂJ[lœpb`gĂȂ(ȑÕhL
    gɏ]Đݒ肵ꍇɂ̂ݓĂ͂܂܂)AŐVł
    SpeedTouch hCo SARlib ɃAbvO[hǂł傤B
    ̍ۂɂ͓pb`Ɂutvpb`𓖂Ă(܂pb`𓖂ĂJ[
    lɍēxpb`Kp܂Bu-RvIvVg)B
    ŉL SpeedTouch hCo SARlib ݒ̎葱𓥂݂܂B
   
    ܂KvȂ͍̂ŐVł SpeedTouch hCoŁÂƂ납
    ܂B
   
    http://sourceforge.net/ <http://sourceforge.net/project/           
    showfiles.php?group_id=3581>                                       
   
    ܂AŐVł SARlib KvɂȂ܂BL̂Ƃœł܂
    B
   
    http://sourceforge.net/ <http://sourceforge.net/project/           
    showfiles.php?group_id=22221>                                      
   
    _E[ht@C̃R}hœWJĂB
   
    tar -xvzf sarlib-x.y.z.tgz     
    tar -xvzf speedtouch-x.y.tar.gz
   
    uEU]vȂb: g Web uEUAL̃pb`
     unzip Ă邩܂(܂ Netscape I .gz
    t@C unzip Ă)BȂĂApb`t@C̖O
     gz 폜āAOύXĂB̌㉺L̎葱
    ɏ]ĂB
   
ȌApb`Ăi߂܂傤B

pb`̓ĕ

 1. J[l\[X̂fBNgɍs܂B cd /usr/src/linux
   
 2. pppoatm-1 pb`eXgIɓĂĂ݂܂B patch -p1 -s -E
    --dry-run < /path/to/pppoatm-1
   
    ̃R}ho͂J[l 2.4.2 ̃\[Xc[ɕs
    ܂BCĂ玟̒iKɍsĂB
   
 3. pppoatm-1 pb`Kp܂B patch -p1 -s -E < /path/to/pppoatm-1
   
 4. hCoRpC܂B͂ƂĂȒPŉL̂悤ɂ΂
    ܂B
   
    cd SpeedTouch (̃fBNg speedtouch-x.y.tar.gz A[JCu 
    WJɂł܂)                                            
    make                                                               
    make install (root ōsKv܂)                           
   
    ŃJ[lhCo(speedtch.o)A /lib/modules/2.4.x/kernel/
    drivers/usb/ (uxv͂ǂ̃J[lo[WĂ邩ɂ
    )B
   
 

9.3. J[l̐ݒ

̃ZNVŕKvȂ̂́A

 E pb`̓ĕɏ]ăpb`𓖂ĂĂJ[l 2.4.x Ă
    ƂłB
   
 

9.3.1. ݒ

J[lݒ肷ɂ́ADȐݒ@ŐݒĂяoĂ (
Ƃ΁Acd /usr/src/linux; make xconfig Ƃ)B

L̃J[lIvVIԕKv܂B

 E Code maturity levels->Prompt for development and/or incomplete code
    /drivers
   
 E Networking options->Asynchronous Transfer Mode (ATM)
   
 E Network device support->PPP (point-to-point protocol) support
   
 E Network device support->PPP support for async serial ports
   
 E Network device support->PPP Deflate compression
   
 E Network device support->PPP BSD-Compress compression
   
 E Network device support->PPP over ATM
   
 E USB support->Support for USB
   
 E USB support->Preliminary USB device filesystem
   
 E USB support->UHCI (Intel, PIIX4, VIA, ...) support
   
     OHCI hCoIԕKv邩܂BUSB Rg[
    ɂ܂B
   
 E USB support->Alcatel Speedtouch USB support
   
    ̃IvV͌Â SpeedTouch hCo܂񂾓J[lpb`
    gĂꍇɂLɂȂ܂BSpeedTouch  SARlib 
    tarball 𗎂ƂĂꍇɂ͖Ȃ̂ŁACɂKv͂܂
    B
   
    IvV̑I: ȒPɌĂ܂ƁAŌ 2 (UHCI/OHCI
    support  Alcatel Speedtouch USB support  M ̕ǂ)ȊO͑S
     Y(M )IłB
   
ł́A̂悤ɃJ[lƃW[RpCĂCXg[
ĂB

 

9.4. \tgEFÃCXg[

̃ZNVł͉L̍ڂKvƂȂ܂(JԂ܂Ał邾
o[WAbvĂ)B

 1. pb`̓ĕƃJ[l̐ݒIĂ邱ƁB
   
 2. Alcatel ̃oCiǗAvP[VBL瓾܂B http:/
    /www.alcatel.com/consumer/dsl/dvrreg_lx.htm. Alcatel 炱𗎂
    Ȃ΂܂Bzz̓CZXɂċ֎~Ă܂B
   
 3. A PPPoATM-aware PPP f[BL瓾܂B
   
      Red Hat 7 RPM (GLIBC2.2): http://sourceforge.net/project/
        showfiles.php?group_id=23818 <http://sourceforge.net/project/
        showfiles.php?group_id=23818>
       
      Red Hat 6 RPM: ܂pł܂B
       
      Debian .deb: http://sourceforge.net/project/showfiles.php?
        group_id=23818 <http://sourceforge.net/project/showfiles.php?
        group_id=23818>
       
      Tarball: http://sourceforge.net/project/showfiles.php?group_id=
        23818 <http://sourceforge.net/project/showfiles.php?group_id=
        23818>
       
 4. PPP 삷ݒ(C^[lbgɂ̓J[l 2.4  PPP ݒ肷
    KCh񂠂܂)B
   
 5. Linux HotPlug \tgEFÁAL瓾܂B http://
    linux-hotplug.sourceforge.net <http://
    linux-hotplug.sourceforge.net>. 葱ɂăCXg[
    (RPM gCXg[ȒPł)B
   
 

9.4.1. pppd CXg[

Kv PPP pbP[WCXg[ĂB /dev/ppp 쐬
Kv邩܂񂪁ÃR}hō쐬ł܂B

cd /dev      
./MAKEDEV ppp

g̃fBXgr[Vɂ MAKEDEV XNvgȂA
foCXȂ肵܂B̏ꍇ́AL̃R}hĂ
B

mknod /dev/ppp c 180 0

 

9.4.2. speedmgmt ̃CXg[

Alcatel̃oCihCo tarball(speedmgmt.tar.gz ) WJāA
tarball ɓĂ葱ɂăCXg[ĂB

 

9.5. \tgEFA̐ݒ

̃ZNVŕKvȂ̂́AL̂ƂłB

 E pb`̓ĕƃJ[l̐ݒA\tgEFÃCXg[I
    Ă邱ƁB
   
 

9.5.1. pppd ̐ݒ

/etc/ppp/options L̓eɏCĂB

          lock
          defaultroute
          noipdefault
          noauth
          passive
          asyncmap 0
          name user@domain
          user user@domain
          plugin /usr/lib/pppd/plugins/pppoatm.so
          0.38
    

    oĂ: ADSL ̃[Uł "user@domain"  2 ӏ
    Kv܂B
   
    ܂L "0.38" ́A҂̃voC_ VPI/VCI ATM ̑gݍ킹
    łBg̃voC_̐lȂ̂māAu
    Ȃ΂܂B̒lԈĂƓ͂Ƃ邩
    񂪁AISP  IP xł͐ڑłȂȂAƂɂȂ
    傤B̒l Alcatel  Windows p̃NCAg ISP m
    Ƃł܂BʏgĂĺA0.32A0.35A8.32A8.35 łB
   
/etc/ppp/chap-secrets L̂悤ɏCĂB

          # Secrets for authentication using CHAP
          # client        server  secret                  IP addresses
          user@domain     *       password
    

e /etc/ppp/pap-secrets ɂĂB

    oĂ: "user@domain"  ADSL ̃[UɁA"password "
    ADSL ̃pX[hɒuĂB
   
 

9.5.2. ŏIݒ

    Note:  ADSL fRs[^甲ĂB
   
 1. USB  Speedtouch ̃J[lhCõR}hŃ[hĂ
    B
   
     a. /sbin/modprobe usb-uhci
       
     b. /sbin/modprobe speedtch
       
 2. USB foCXt@CVXẽR}hgă}EgĂ
    B mount none /proc/bus/usb -tusbdevfs
   
 3. Alcatel ǗAvP[ṼR}hŃX^[gĂB 
    /usr/sbin/mgmt
   
 4. ADSL f USB |[gɑ}āAb҂ĂB 1 ̒[
    J /var/log/messages 𒭂߂̂肩܂Bf
    AL̂悤ɂȂ̂킩͂łB
   
    Speedmgmt[2074]: Modem initialised at 576 kbit/s downstream and 288
    kbit/s upstream
   
 

10. {Ŏӎ

ZĂ^Yɂ́Ȁ؂Ă\グ܂B
肪Ƃ܂B

