  Red Hat Linux 6.Xō\zz[lbg[ÑC^[lb
  gQ[gEFC
  Paul Ramsey <pramsey@refractions.net>

  2000N622
   NO(ysuzuki@bb.mbn.or.jp)
  2000N1030

  ƒ⎖̏K͂ȃlbg[ÑQ[gEFCRed Hat 6ñfB
  Xgr[V^p邽߂̐ݒɂďqׂȒPȓ啶
  B}XJ[hDNSEDHCPE{IȃZLeBɂĐ܂B

  ______________________________________________________________________

  ڎ

  1. ͂߂
     1.1 XV
     1.2 쌠

  2. @̐ڑ
     2.1 nug
     2.2 nugȂ
     2.3 lbg[NJ[h1̂Ƃ

  3. lbg[N̐ݒ
     3.1 lbg[NhCo[̐ݒ
        3.1.1 ^̃lbg[NJ[h2Ƃ
     3.2 lbg[N̐ݒ
        3.2.1 lbg[NfoCX
        3.2.2 DHCPT[o
        3.2.3 NCAgRs[^
        3.2.4 DNST[o
        3.2.5 lbg[N̎
     3.3 Olbg[N̐ݒ
        3.3.1 ŒIPAhX̏ꍇ
        3.3.2 DHCP̏ꍇ
        3.3.3 ȏꍇ
           3.3.3.1 EthernetłPPP(PPPoE)
           3.3.3.2 قDHCPւ̑Ή
           3.3.3.3 Road Runner
        3.3.4 lbg[Nݒ̊mF
     3.4 Sm

  4. IP}XJ[h̐ݒ
  5. QΉ
     5.1 ICQ삵Ȃ
     5.2 Red Hat 6.XłȂCaldera 2.X̏ꍇ
     5.3 lbg[ÑRs[^WebT[o[ɂ

  ______________________________________________________________________

  1.  ͂߂

  ́̕Aƒ⏬Ȏ̃Rs[^lbg[ÑC^[
  lbgQ[gEFCƂRed Hat 6.Xݒ肷邽߂́AȌȎ菇
  BʂȃP[X͍lĂ܂񂵁Agplbg[NAhXɂ
  Ă肵Ă܂BƂdvȉȉɎ܂B

  o  P[uerADSLŃC^[lbg֏펞ڑĂ

  o  Œ 1̃Rs[^ɁARed Hat 6.XCXg[Ă
     BȂ́̕AMacmillan PublishinglXȖOŔzzĂ
     Mandrake 6.X ({ł͌܋u}CX^[Linux Mandrakev
     O9̔Ă܂)ȂǁARed HatñfBXgr[
     VɂLłB

  o  ȂLinuxRs[^ɁALinuxŗp\ȃlbg[NJ[h
     2}Ă

  o  2ȏ̃Rs[^Ńlbg[N\zĂ̂ȂEthernetn
     u1A܂1̃Rs[^łȂ΃NXP[uĂ
     

  o  LinuxRs[^ŃeLXgt@CҏW@mĂ

  o  rootŃOCłALinuxCD-ROMRPMpbP[WCXg[
     

  ȏ̉̂ꂩɍȂ̂Ȃ΁A炭͂̕Ȃ
  ł͂܂B

  CXg[̍ۂɓʂȂƂKv͂܂BȂ̍D݂ɍ
  ăCXg[ĂB́̕Albg[N\zɕKvȂ
  ŏ炷ׂăCXg[@܂B܂ACXg[
  ̓ʂȐݒʂȃ\tgEFÃCXg[OƂĂ܂B
  mɂAݒ񂪂ǂ̃t@Cɂ邩̂h߁AVX
  eݒt@C𒼐ڕҏW܂BRed Hat񋟂GUIݒc[͎gp
  ܂BȂ邩܂񂪁AtɁÃfBXgr[
  VAقȂ󋵂łȂ̒m𐶂悤ɂȂł傤(X
  ȂꍇAj^[̂ȂT[oȂǂł)B

  1.1.  XV

  ̍̕ŐVł͏펞AHTML`Ȃ
  http://www.coastnet.com/~pramsey/linux/homenet.htmlŁA SGML`Ȃ
  http://www.coastnet.com/~pramsey/linux/homenet.sgmlŁAꂼ꓾
  Ƃł͂ł(: {
  http://www.linux.or.jp/JF/JFdocs/Home-Network-mini-HOWTO.htmlœ
  ܂)B

  o  1999N1221 : 1

  o  2000N12 : Olbg[NڑŋNsɂJohn
     Mellor̒Ă󂯓

  o  2000N122 : ^̃lbg[NJ[h𕡐 gpꍇɂ
     ďȏCsAChris LeaIPGCAXɊւ̒񋟂
     

  o  2000N316 : Nelson Gibbs瓾l[T[õZLeB
     Caldera LinuxΉɂāAXV

  o  2000N622 : Red Hat 6.2̃RtBM[V̖ɂ
     ǉA Kerr First炢PPPoEɂĕ⑫

       {|ł̍XV͈ȉ̒ʂłB

       o  2000N730F2000N122łɖ|B|ɂ
          āAȉ̕ɃRg𒸂܂(sAh̗)B
          肪Ƃ܂B

          o   L

          o   qV

     o  Masaharu Goto

     o  X{ ~

     o  konkiti

     o  Hiro YAMAZAKI, Ph.D

     o  eJ 

     o  R `V

     o   r

     o  H G

  o  2000N1030F2000N622łɖ|B|ɂ
     āAȉ̕ɃRg𒸂܂(sAh̗)B
     肪Ƃ܂B

     o   L

     o  MIZUHARA Bun

  1.2.  쌠

  Copyright (C) 2000, Paul Ramsey.

  ȉ̐ɏ]΁Ȃ̕Ŝ܂͈ꕔ𖳗ŕʂĂ܂܂
  B

  o  ŜRs[ꍇłꕔRs[ꍇłAL̒
     \Ƃ̕ʋSȏԂŕύXȂɊ܂܂Ȃ΂Ȃ
     

  o  ̖̕|A̕ɂȂĐ܂ꂽƂ̌ʂzz
     ۂ́AOɏʂł̒̕҂ɏF𓾂Ȃ΂Ȃ܂

  o  ̈̕ꕔzzۂ́A̕Ŝ𓾂@̒
     Ɋ܂߁A̎i񋟂Ȃ΂Ȃ܂

  o  ]̂߂̎⑼̃vWFNgňp邽߂ȂΓK؂ȎQl
     \Ă̈̕ꕔA̋ȂɕʂĂ
     ܂

  ̗̐OƂāAwpړI̗pF߂邱Ƃ܂B҂
  AĂB̐͒҂邽߂ɐ݂܂BF
  ̊wK⋳𐧌邱ƂړIł͂܂B

       : ɏ]AȉɎ܂B

       This manual may be reproduced in whole or in part, without
       fee, subject to the following restrictions:

       o  The copyright notice above and this permission notice
          must be preserved complete on all complete or partial
          copies.

       o  Any translation or derived work must be approved by the
          author in writing before distribution.
  o  If you distribute this work in part, instructions for
     obtaining the complete version of this manual must be
     included, and a means for obtaining a complete version
     provided.

  o  Small portions may be reproduced as illustrations for
     reviews or quotes in other works without this permission
     notice if proper citation is given.

  Exceptions to these rules may be granted for academic
  purposes: Write to the author and ask. These restrictions
  are here to protect us as authors, not to restrict you as
  learners and educators.

  2.  @̐ڑ

  nu̗LŁAlbg[Ñg|W[͂킸ɈقȂ܂B̕
  ́A RJ45RlN^̃P[u(dbɎP[uA:10BASE-TȂ)
  glbg[N܂BׂP[u(:10BASE2Ȃ)
  ΏۊOłBׂ̍P[ug΃nug킸ɁÃRs
  [^Ńlbg[NgނƂł܂Aڑ̏I[Ȃǂɒӂ
  ΂Ȃ܂Blbg[NɂĂłɒmɂ͎֑
  ܂񂪁B

  2.1.  nug

  nuȂ΁AȂ̃lbg[N͂̂悤Ȃ
  <http://www.coastnet.com/~pramsey/linux/w_hub.gif> ɂȂł傤B

  t̍ۂɃT[rXvoC_񋟂P[uA܂͂Ȃ̊
  œ삷邱Ƃ킩ĂP[upāALinux{bNXeth0J[
  hP[ufADSL{bNX֐ڑ܂B͏dvłBȂ
  AP[ufɂ́ANXP[uŐڑ邱Ƃ΃Xg[g
  P[uŐڑ邱Ƃ邩łBvoC_񋟂P[u
  gΖ͂܂B

  Xg[gP[uŁALinux{bNXeth1J[hnuƐڑ܂B
  ȊÔׂẴRs[^Xg[gP[uŃnuƐڑĂ
  B

  2.2.  nugȂ

  nuȂĂANXP[ugĂȂLinux{bNX1
  Rs[^Ɛڑ邱Ƃł܂B̃g|W[͂̂悤Ȃ
  <http://www.coastnet.com/~pramsey/linux/wo_hub.gif> ɂȂł傤B

  T[rXvoC_񋟂ꂽP[uŁALinux{bNXeth0J[h
  P[ufADSL{bNXƐڑ܂BāALinux{bNX
   eth1J[hNXP[uő̃Rs[^ƐڑĂB

  2.3.  lbg[NJ[h1̂Ƃ

  ̂悤Ȑݒ͐܂񂪁A\łBłAȂ̏ꍇɂǂȂ
  ͕ۏ؂ł܂̂ŁA炸B̂悤ȐݒƁAȂ
  lbg[N̓ƊOIɓlbg[NƂȂ܂B̂ߗ_
  Iɂ̓NbLOɎキȂ܂Bۂɂ́Å댯͂炭ƂĂ
  ႢłB

  Linux̃J[ĺAIPGCAXT|[gĂ̂ŁA
  EthernetJ[h֓ɓ̈قȂIPAhXU邱Ƃł
  BRed HatMandrakeŒ񋟂J[l͍ŏIPGCAXT|
  [gĂ܂BꖇEthernetJ[hŃQ[gEFC𗧂グƂ
  ́Aȉ̐eth1̉ӏ eth0:0ƒuēǂłB
  lbg[NJ[h1̂ƂDHCPT[o𗧂グ邱Ƃ́A
  ߂܂B

  ׂẴRs[^ƃP[ufADSL{bNXAnu֐ڑĂ
  BāADȂ܂ȂĂA֐iłB

  3.  lbg[N̐ݒ

  łɁAQ[gEFCRs[^LinuxCXg[Ă͂
  BɁAlbg[NJ[h1łɐݒ肵AC^[lbgƂ
  ڑĂ邩܂BAX̓[n߂܂Bݒ
  ȂĂȂ󋵂z肵܂B

  ܂ArootŃOCĂB̕ł́AȂrootŃOC
  Ă̂Ƃđ@qׂĂ܂B

  Linux̃J[ĺAȂ2EthernetJ[heth0eth1 ƂĔF
  ܂Bł炱̕łꂩ瓯悤ɋLq܂B́Aǂ
  ̃J[hǂł邩AłBł́AȂƂ50%̊mő
  vłƕۏ؂łA"ȒP"@܂BJo[OčƂ
  Ƃ̗v̂ŁA}U[{[hɂȂ悤ɂȂ̃Rs[^
  ɂARs[^̔wʂƂɁA[ɂȂJ[heth0łB
  }XLOe[vȂǂŃx\ĂƗǂ܂B
  ĎɁA eth0eth1J[h̐ƃfĂB

  ł́Aeth0J[heth1J[hJ[lIɔFĂ邩A
  Ă݂܂傤Bifconfig eth0ifconfig eth1 ƃ^CvĂBƂ
  ɁAJ[llbg[NJ[hFĂȂ΁Aȉ̂悤ɕ\
  ܂(ȂǂقȂ邩܂)B

  eth0   Link encap: Ethernet   HWaddr 00:60:67:4A:02:0A
         inet addr:0.0.0.0  Bcast:0.0.0.0  Mask:255.255.255.255
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:466 errors:0 dropped:0 overruns:0 frame:0
         TX packets:448 errors:0 dropped:0 overruns:0 carrier:0
         collisions:85 txqueuelen:100
         Interrupt:10 Base address:0xe400

  J[llbg[NJ[hFĂȂƁÂ悤ȕ\ɂȂ
  傤B

  eth0: error fetching interface information: Device not found.

  3.1.  lbg[NhCo[̐ݒ

  ̃lbg[NJ[hJ[lɔFĂA̐߂͂Ƃ΂
  BłȂ́A̐߂ǂłB

  Ƃ킯ŁAJ[llbg[NJ[h1܂͗ƂF
  łA{̂ƂA͖ł͂܂BJ[hF
  @Ƃ͂ƃJ[l֓`΂悢̂ƂłBL
  ܂̂łׂĂ̏ꍇJo[邱Ƃ͂܂Bʓ|ȂƂN
  AEthernet HOWTO voĂ(:a܂jB
  ł́AAhoCXv񂵂ďЉ܂B

  o  J[hŐVsŃhCo[ȂΘb͕ʂłAʓIPCIoX
     lbg[NJ[hȂΎԂ͊yςł܂Blbg[NJ[hɂ
      (ȊÔ̂ɂĂł)A΂Α̏
     /proc/pci t@CɋLĂ܂BƃfĂ
     B

  o  ISAoX̃lbg[NJ[hȂ΁AJ[hgIOx[XAhX
     IRQKvɂȂ邱Ƃ܂B}jA܂ˁB܂
     ˁBȂ΁ÃEFbuTCĝāAIC̃
     t@XJĂ邩mFĂB̂DOSp̐ݒfBXN
     Ȃ΁ADOSNāAAhX IRQQƂݒ肷Zbg
     AbvvOTĂB

  o  ISAoX̃vO&vCJ[hȂ΁A܂ݒ@w΂Ȃ
     ΂ȂȂł傤BPlug'n'Play HOWTOǂł(:a
     ܂)B킢Axݒ肵Ƃ΁AIOx[XAhX
     IRQ𐳊mɂ킩Ăł傤B

  eth0eth1̐ƃf킩܂AEthernet HOWTO (a
  )compatibility page(x_[/[J[/fŗL̏)Ă
  BȂ̃J[h̒TAĂhCo[ƁAKv
  ȂʂȃIvVɊւׂāAĂB

  ł́Aݒt@CҏW܂傤BҏŴ/etc/conf.modules
  łB̃t@CAgꂽeLXgGfB^ŊJĂB
  t@Cɂ͂낢ȂƂ߂܂AgĂQ[gEF
  C̃t@CᎦĂ܂BgĂ̂́AVIA Rhinẽ`bv
  ڂĂPCIoX 10/100MbJ[hƁAȂ̕ϓNȂISAoX10Mb
  NE2000݊J[hłB100Mb̃J[hlbg[Nւ̐ڑɎg
  A10Mb̃J[hŊO֐ڑĂ܂B/etc/conf.modulest@C
  ́Â悤ɂȂĂ܂B

  alias parport_lowlevel parport_pc
  alias eth0 ne
  options ne io=0x300 irq=10
  alias eth1 via-rhine

  conf.modules̓eƁA

  o  ŏ̍s̓p|[gv^[Ɏg߂̐ݒłB悤
     ȍsȂ̃t@Cɂ邱Ƃł傤BύXȂłB

  o  2s(alias eth0 ne)̓J[lցAeth0foCXnehCog
     悤wĂ܂B

  o  3sڂoptions ne io=0x300 irq=10nehCo[ցAISAJ[h
     IOAhXIRQ݂ʒm܂BISAJ[hȂ炨
     ̂悤ɁAJ[hɍhCo[IOAIRQ֏K
     vł傤B

  o  4s(alias eth1 via-rhine)eth1via-rhinehCo[g悤
     J[l֎wĂ܂Beth1J[hPCIJ[hłA
     IOIRQɂĂ̏ʒmKv͂܂BPCITuVXe
     IɃJ[h̐ݒȂ܂B

  Ȃ2̃lbg[NJ[h̃GCAXƁAׂĂISAJ[h̐
  IvVs/etc/conf.modulest@CɋLqĂ邩mF
  傤BȂACXg[̂Ƃɐݒ肵ׂẴC[T[lbgJ[h
  ɂẮÂƂ̐ݒ肪ł/etc/conf.modulest@C֏
  Ă邩܂B

  conf.modulest@C̕ҏWIAifconfig eth0 ifconfig eth1
  x Ă݂ĂB̃}jAȂIOAhX
  IRQ킩Ȃ΁AxsJԂȂƃ_܂
  B

  3.1.1.  ^̃lbg[NJ[h2Ƃ

  {ɌȂƂɁALinuxQ[gEFCpɓ^̃lbg[NJ[h
  2wA܂삵ĂȂAȂƂ邩܂
  BłASz͕svB2̃J[hɂ́AP
  /etc/conf.modulest@C𐳂@ɂċLq΂悢
  ̂ƂłBł͗ƂNE2000݊J[h (悭Ił)g
  wꍇɂāAAhXIRQԍKɌ߂Đ܂B
  /etc/conf.modulest@C͂̂悤ɂȂ܂B

  alias eth0 ne
  alias eth1 ne
  options ne io=0x330,0x360 irq=7,9

  ֘AIvV1sɂ܂Ƃ߂܂BeIvV́Aŏ̐
  eth0A 2Ԗڂ̐eth1̂̂łB

  3.2.  lbg[N̐ݒ

  "lbg[N"Ƃ́AƒГɂ邷ׂẴRs[^
  Ƃ肷lbg[N̂ƂłB"Olbg[N"Linux Rs[
  ^̂̒[ɂȂĂA傫ċ낵C^[lbĝ
  łBʓILinux{bNXƊOƂ̊ԂłȂɋ͂ȃt@C
  A[EH[ƂȂ邽߁Albg[N͊Olbg[N犮Sɐ
  藣܂B

  3.2.1.  lbg[NfoCX

  hCo[ɓ삵ifconfigeth0eth1̗mFł悤ɂ
  ܂̂ŁÃz[lbg[N𗧂グ܂傤B
  ́Aeth1ɓlbg[NAeth0ɊOlbg[NڑĂƉ
  ܂B

  Ȃ̓lbg[ŃAJ邱Ƃ͂Ȃł傤Alb
  g[N̂߂ɗ\񂳂Ăʂȃlbg[NA192.168.1.0AƂȂ
  ł傤B́A"J̃NXClbg[N"łBoĂ΁AF
  BɊSĂ炦邩B

  ܂ŏɃlbg[NNĂȂ΂Ȃ܂B
  /etc/sysconfig/networkt@CmFāAȉ̍sȂ΋LĂ
  B

  NETWORKING=yes
  FORWARD_IPV4=yes

  1sڂLinuxɁAu[gɃlbg[NfoCXNĂقƂ
  `܂B2sڂIPtH[fBO\ɂ悤Linux֓`܂B
  4߂Ń}XJ[h̐ݒn߂ƂɕKvƂȂ܂B

  Red Hat 6.2 ̒ӎ: IPtH[hƃ}XJ[hRed Hat 6.2ł
  Ɠ삳ɂ́A/etc/sysctl.conft@CCȂ΂Ȃ܂
  Bȉ̍sǉAlɐݒ肵ĂB

  net.ipv4.ip_forward = 1
  net.ipv4.ip_always_defrag = 1

  Red HatRed HathfBXgr[Vł́AׂẴlbg
  [NC^[tF[X̐ݒ/etc/sysconfig/network-scriptsfBNg
  ̃t@CɊ܂܂Ă܂B̃fBNgɈڂāAVifcfg-
  eth1 t@C쐬Aȉ̓eLqĂB

  DEVICE=eth1
  IPADDR=192.168.1.1
  ONBOOT=yes

  ̓lbg[NXNvgցAeth1u[gɐݒ肵w肳ꂽIPAh
  X^悤wĂ܂B̃R}hŁA̐Vݒp
  Ȃ̃lbg[N𓮂܂傤B/etc/rc.d/init.d/network
  restartƃR}hłłB

  3.2.2.  DHCPT[o

  DHCPT[o͎IɁÃz[lbg[ÑfoCXIPAhX
  ݒ肵܂BbvgbvgĂlBɂ͂ƂĂ֗łBRs[
  ^lbg[NɂȂ邾łɓK؂Ȑݒ肪Ȃ܂Blb
  g[NDHCPT[osvȂΎ̐߂֔łB

  ܂DHCPT[oCXg[ĂKv܂BLinux CD-ROM}
  EgāA dhcp RPMCXg[ĂB/etc/dhcpd.conf
  t@CҏWAȉ̓eɂĂB

  subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.2 192.168.1.60;
    default-lease-time 86400;
    max-lease-time 86400;
    option routers 192.168.1.1;
    option ip-forwarding off;
    option broadcast-address 192.168.1.255;
    option subnet-mask 255.255.255.0;
  }

  LinuxRs[^LbVpDNST[oƂ̂Ȃ΁Aȉ
  IvVĂB

  option domain-name-servers 192.168.1.1;

  ODNSAhXmĂāALinuxRs[^DNSƂ
  ȂȂ΁ÃIvVLĂBx.x.x.xy.y.y.ýAO
   DNST[oIPAhXłB

  option domain-name-servers x.x.x.x, y.y.y.y;

  WindowsRs[^ƃt@CL邽߁ASambaLinux{bNX
  œȂ΁ALinuxRs[^ftHgWINSƃuEUT[o
  Ďg߈ȉ̃IvVǉĂB

  option netbios-name-servers 192.168.1.1;
  option netbios-dd-server 192.168.1.1;
  option netbios-node-type 8;
  option netbios-scope "";

  SambaWINS̐ݒ͈͂̔͂̕zĂ܂BKvȂ΁A SMB
  HOWTO QƂĂ(:a܂B{Samba[ŨTC
  gQlɂȂ܂)B

  ܂ƂKvłBɁA/etc/rc.d/init.d/dhcpdt@C̍Ō
  Ɉȉ̍sǉĂB

  /sbin/route add -host 255.255.255.255 dev eth1

  WindowsDHCPNCAǵADHCP̉ɓ̃u[hLXgAh
  XKvƂ܂B̃R}hLinuxTCP/IPX^bNɂ𐶐
  ܂B̍sȂꍇ̓t@CɋLqĂB悤ȍs
  ĂAfoCXeth1ɂȂĂ邩mFĂB

  ɁA/etc/rc.d/init.d/dhcpdt@CύXAeth1ftHgfoCX
  Ƃ܂B̍sA

  daemon /usr/sbin/dhcpd

  ȉ̍sŒu܂B

  daemon /usr/sbin/dhcpd eth1

  DHCPN̏ł܂B܂AR}h/etc/rc.d/init.d/dhcpd
  startDHCPT[oNĂB

  ŌɁARs[^ċNDHCPT[oオ邩mF
  BDHCPT[öꕔRPMobP[ẂANDHCPT[oオ
  ȂݒɂȂĂ܂BłAchkconfig dhcpd onR}hs
  mɋN悤ɂ܂B

  ̃R}hRed HatɁAdhcpNXNvgA/etc/rc.dfBNg
  ̂܂܂ȃx̃fBNg֒ǉ܂Bx35
  (}`[U[̃R\[ʂXEBhE)DHCPT[o͋N
  ܂Bx01E6(Vbg_EƃVO[U[[hEċN
  )DHCPT[o͏I܂B

  3.2.3.  NCAgRs[^

  DHCP𗧂グĂ܂΁ANCAgRs[^̐ݒ͂ƂĂȒP
  BDHCP̐ݒLɂΗǂłBWindowsRs[^Ȃ
  ΁A"Rg[pl"JA"lbg[N"IA"TCP/IP" v
  gR"ݒ"I܂B"TCP/IPAhX̎ݒ" {bNX
  `FbNAύX𔽉fāAċNĂ(:Windows 95̏ꍇ
  ́A"Rg[pl""lbg[N"IA "lbg[N̑I
  "TCP/IPA_v^̃vpeBIт܂B "IPAhX"^u
  ŁA"IPAhXIɎ擾"`FbNĂ)B

  NCAgRs[^̍ċN̑OɁALinux{bNXtail -f
  /var/log/messagesR}hsƗǂ܂BLinux̃VXe
  O邱Ƃł܂B qǂ΁AWindowsRs[
  ^ċN̂ƂIPAhXvDHCPT[oĂ邱Ƃ킩
  ł傤BR}h tail -f甲oɂ́AControl-CgĂ
  B

  DHCPT[o𗧂グȂĂANCAgRs[^̐ݒ͂
  ȒPłB IPAhXݒ肷ɂ͂xA"Rg[pl"
  " lbg[N"JATCP/IPvgR̐ݒIł(
  :Windows 95 ̏ꍇ́A"Rg[pl""lbg[N"I
  A "lbg[N̑I"TCP/IPA_v^̃vpeBIсA"IP Ah
  X"^uJĂ)Blbg[NAhX192.168.1.0ƃu[
  hLXgAhX192.168.1.255ALinuxT[o192.168.1.1ȊÓA
  lbg[N192.168.1.0̔Cӂ̃AhXNCAgRs[^
  蓖Ă邱Ƃł܂BāA2̃Rs[^ɓIPAhX
  ^ȂłB "Q[gEFC"AhXɂ192.168.1.1w肵
  B΁AOւ̃gtBbNLinuxQ[gEFC֌܂B

  NCAg̐ݒɂẮAIP Masquerading HOWTO(: a󂠂
  ) Configuration Section(: ̑IP}XJ[h̖ƃ\tg
  EFAT|[g)ɂƂĂڍׂȏ񂪂܂B

  DHCPgꍇAłȂQ[gEFC192.168.1.1̃lbg[
  N192.168.1.X̃AhXgꍇANCAgRs[^DNS̐
  ꍇ ʓIɁAlbg[NDNSLbVT[o𓮂Ȃ
  192.168.1.1AłȂ΃voC_[w肷DNST[õAhX
  w肵ĂB

  3.2.4.  DNST[o

  Linux{bNXLbVpDNST[oƂ΁AȂ̃lbgT[tB
  ̃Xs[h኱ Ȃ܂B悭ghCȂ̃lb
  g[NɃLbVOoKvȂȂ邩łB

  {iIDNSɋȂ΁AGȎw΂˂΂Ȃ܂
  B DNS HOWTO ܂(:a܂)AЂȂDNS and
  BINDǂ (ĂƂĂԗI)̎QlɂȂ邱Ƃł傤B

  NCAg}VLbVpDNST[ỏb󂯂邽߂ɂ́Av
  C}[DNS T[oƂLinuxQ[gEFCg悤NCAgR
  s[^Őݒ肷Kv܂B̕@ADHCPɂĐ
  3.2.2߂Ŏ܂B䎩ŃNCAgRs[^ݒ肷̂
  ΁AIPAhX̐ݒƓRg[^uDNS̐ݒύX邱
  Ƃł܂B

  DNST[oCXg[ۂ́A܂ŏbind RPMCXg[A
  caching-nameserver RPMCXg[ĂBŁA͂
  ƂǊłB

  CXg[΃LbVpDNST[o͐ɓ삵܂BC
  ^[lbgvoC_DNST[oIPAhXmł
  A/etc/named.conf t@CҏWȉ̍sdirectorys̎ɒǉ
  ƁA\サ܂Bx.x.x.xy.y.y.yDNST[õv
  C}[AhXƃZJ_[AhXłB

  forwarders { x.x.x.x; y.y.y.y; };

  ƂȂDNST[óAwꂽAhXTăC^[lb
  gOɁA܂voC_DNST[o֖₢킹܂BvoC_
  DNST[o͖LxDNSLbVɕێĂ܂Ȁ
  AȂ̃T[oƑoƂł܂B

  1Nnamedf[ɃZLeB̖肪Ă܂B
  łAKŐVo[WgĂBăZLeBグ
  邽߁AftHg̐ݒ肩炢̓_ύXĂB

  1. ܂bind̃o[W`FbNA8.2.2ȍ~ł邱ƂmFĂ
     BāARed Hat Updates Mandrake Updates QƂAŐṼo
     [W`FbNĂB

  2. l[T[o[ւ̐ڑ[Jlbg[NɌ肷邽߁A
     /etc/named.conft@Cforwardersš allow-query {
     192.168.1/24; 127.0.0.1/32; };ƂsǉĂB

  3. l[T[o[rootœȂłBrootœĂ
     ƁAl[T[o̗p҂root𓾂Ă܂܂B̒Ⴂ[
     U[AƂ nobodyȂ΁Al[T[o̎sňN꓾
     ܂BT[onobodyœ߂
     ́A/etc/rc.d/init.d/namedt@CҏWAdaemon namedsdaemon
     named -u nobody -g nobodyƕύXĂB

  u[gDNST[omɋN悤Achkconfig named onR}h
  sĂB΁Aʂ̃x(35)̋NɃl[T
  [on߂܂B

  ƏI΁ÃR}hDNST[oNł܂:
  /etc/rc.d/init.d/named start

  3.2.5.  lbg[N̎

  Olbg[Nݒ肵ȂDNST[rX͓܂BȂȂAC
  ^[lbg̑DNST[oƏKv܂B
  A pingvOŁAlbg[NƂȂĂ邩̓e
  Xgł܂B

  NCAgRs[^ŁA^[~iEBhE(MS-DOS)JāA
  ping 192.168.1.1ƑłłB̃R}h́AȂ LinuxR
  s[^֋KIȊԊuŃpPbg𑗏o܂BLinuxRs[^͂
  ɔăpPbg𑗂Ԃ܂BȂ΁ApPbg̉
  \͂łB

  3.3.  Olbg[N̐ݒ

  ŁAOlbg[Nݒ肷鏀܂BȂ̃C^[
  lbgvoC_LinuxT|[g̐ɂ܂Aڑ̐ݒ肪
  ܂BɒʂAȂڍׂADSLĂADSL
  HOWTO܂ (:a܂)BȂACable Modem HOWTO
  AւNƎv܂(:Cable Modem Provider
  HOWTO܂Ba݂܂)B

  Oւ̐ڑłɖɂȂ̂́AIPAhX̎擾łBP[u
  ADSLŐڑĂڋq֌ŒIPAhXzzvoC_Ȃ΁Aݒ
  ͊ȒPłB̃voC_͓IݒAłDHCPłA̗p
  悤ɂȂėĂ܂B܂肠ȂLinuxRs[^́Aeth1
  łDHCP T[oƂȂAeth0łDHCPNCAgƂȂ܂B

  ɁAڋqWindowsRs[^gĂƉ肵āAWɏ
  Ȃʂȕ@ŃT[rX񋟂ĂvoC_̂łB̂悤
  ȏꍇ̂ɂāA3.3.2߂̍Ōŏqׂ܂B

  3.3.1.  ŒIPAhX̏ꍇ

  C^[lbgvoC_ŒIPAhXȂɕt^ĂꂽȂ
  ΁AbL[łB܂AVKɈȉ̓ẽC^tF[Xݒt@C
  /etc/sysconfig/network-scripts/ifcfg-eth0쐬ĂB

  DEVICE=eth0
  IPADDR=x.x.x.x
  NETMASK=y.y.y.y
  ONBOOT=yes

  ŁAx.x.x.xy.y.y.y͂ꂼAC^[lbgvoC_w
  lŒuĂB/etc/resolv.conft@CҏWAȉ
  ͂܂B

  search provider_domain_here
  nameserver n.n.n.n
  nameserver m.m.m.m

  ŁAprovider_domain_here̒l̓C^[lbgvoC_w
  Ă͂łBăvC}[ƃZJ_[DNST[oIPAh
  XAn.n.n.n m.m.m.m̂Ƃ֋LqĂBLinuxRs
  [^DNST[o𑖂点̂Ȃ΁Ãl[T[o̍s̑O
  ɁAnameserver 127.0.0.1 Ƃsǉł܂ BƂȂ
  LinuxT[óADNSÕT[o֐q˂OɃLbVT[og
  悤ɂȂ܂B

  3.3.2.  DHCP̏ꍇ

  Ȃ̃C^[lbgvoC_DHCPɂݒ̗pĂƂ
  ́Aȉ̓ẽC^[tF[Xݒt@C
  /etc/sysconfig/network-scripts/ifcfg-eth0VKɍ쐬Kv
  ܂B

  DEVICE=eth0
  BOOTPROTO=dhcp
  ONBOOT=yes

  āADHCPNCAg̃f[dhcpcdmɃCXg[Ă
  B Linux CD-ROMAdhcpcd RPMpbP[WCXg[܂B

  ł́AVlbg[N̐ݒeXg܂BR}h
  /etc/rc.d/init.d/network restartłłBĊOւ̐
  pingŃeXg܂BC^[lbg̃Rs[^AƂ
  www.yahoo.compingĂ݂āA邩m߂܂(: ꕔ̃TCg
  pingɔȂ悤ȐݒɂȂĂꍇ邻ł)B

  3.3.3.  ȏꍇ

  Ȃ̏󋵂́A܂ŏqׂė悤ȂƂĂPȏ󋵂Ƃ͈قȂ邩
  ܂Bł́A܂܂ȍɂĒZ߂܂B
  ܂AM̂ł񌹂փNÃAhX܂BN
  񋟂ĂāA̐߂ǉ邫ƂȂJohn MellorɊӂ
  ܂B

  3.3.3.1.  EthernetłPPP(PPPoE)

  xEAgeBbNȂǂADSLvoC_͐VǨڋq
  ɁA"Ethernet łPPP(PPP over EthernetAPPPoE)"vgRɂڑ
  ߂Ă܂B̂Windows̃NCAgvO񋟂Ă
  ALinux[U[ɂ͕sւłBKPPPoE͒PȃvgR
  ŁALinuxŃT|[g邽߂̃vWFNgisłB

  o  Kerr FirstɂƁARoaring Penguin PPPoE Client͓ǂłƂ
     𗧂܂

  o  PPPoE on Linux for Bell Sympatico

  o  SympaticopLinuxPPPoE(ʏ(General Info)) (Linux(Linux
     Info))

  3.3.3.2.  قDHCPւ̑Ή

  lbg[NvoC_́AڋqgzXglbg[NC^[
  tF[XJ[hɌ肷邱ƂD݂܂B炭Anug
  ĂȂEhternet |[g֕̃Rs[^ڑ邱Ƃh
  ł傤Bnuł͂Ȃ LinuxIP}XJ[hgΓ悤
  ʂ܂BŜقȂ܂AP[uЂɂo
  ܂(: ̂悤Ȑڑ֎~ĂvoC_[ɂ͂邻
  łB_emFĂ)B

  voC_ȂɃzXgwAڑƂ͂ȂWindowsR
  s[^ɂ̃zXg悤vꍇAȂLinuxR
  s[^voC_ DHCPT[oփAhXvƂ͂̃zXg
  𖼏悤ɂȂ΂Ȃ܂B

  C^[tF[Xݒt@CBOOTPROTOdhcpƃZbg΁ARed Hat
  DHCP NCAgĂ΂܂BzXg͎QƂ܂BRed
  Hat6.1ŁAzXgw肵ăNCAgĂԂ
  ́A/etc/sysconfig/networkt@CҏWAȉ̍sύXĂ
  B

  HOSTNAME=

  ȉ̂悤ɏC܂B

  HOSTNAME=voC_w肵zXg

  Red HathfBXgr[V̂Ȃɂ́Ał͂܂
  Ȃ̂邩܂B̍ۂ/sbin/ifupXNvg
  dhcpcdpumpĂяoƂɁA-h $HOSTNAMEXCb`w肳Ă邩
  `FbNĂB̃XCb`ȂΒǉ܂B܂A
  /sbin/dhcpcd -i $DEVICE -h $HOSTNAME /sbin/pump -i $DEVICE -h
  $HOSTNAMEƂȂ܂B

  3.3.3.3.  Road Runner

  Road Runner P[uT[rX̃OC͓ʂłBT[og悤
  ȂOɁAOCvZXĂȂ΂Ȃ܂BKAڍ
  Linux Road Runner HOWTO܂B

  3.3.4.  lbg[Nݒ̊mF

  ܂ł̂Ȃ̓w͂̐ʂĂ݂܂傤Bifconfigƃ^CvAݒ
  foCXׂČ܂傤B̃Q[gEFCRs[^ł͂̂
  ɂȂ܂B

  eth0  Link encap:Ethernet  HWaddr 00:60:67:4A:02:0A
        inet addr:24.65.182.43  Bcast:24.65.182.255  Mask:255.255.255.0
        UP BROADCAST RUNNING MULTICAST  MTU:1500 Metric:1
        RX packets:487167 errors:0 dropped:0 overruns:0 frame:0
        TX packets:467064 errors:0 dropped:0 overruns:0 carrier:0
        collisions:89 txqueuelen:100
        Interrupt:10 Base address:0xe400
  eth1  Link encap:Ethernet  HWaddr 00:80:C8:D3:30:2C
        inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
        UP BROADCAST RUNNING MULTICAST  MTU:1500 Metric:1
        RX packets:284112 errors:0 dropped:0 overruns:0 frame:1
        TX packets:311533 errors:0 dropped:0 overruns:0 carrier:0
        collisions:37938 txqueuelen:100
        Interrupt:5 Base address:0xe800
  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:12598 errors:0 dropped:0 overruns:0 frame:0
        TX packets:12598 errors:0 dropped:0 overruns:0 carrier:0
        collisions:0 txqueuelen:0

  ӂĂBOIPAhXĂ̂eth0ŁÃvCx
  [gIPAhXĂ̂eth1łB

  lbg[ŇoHɂ́ArouteR}hg܂B̃Q[gEF
  CRs[^ł͈ȉ̂悤ɂȂ܂B

    Kernel IP routing table
    Destination     Gateway      Genmask         Flags Metric Ref Use Iface
    255.255.255.255 *            255.255.255.255 UH    0      0     0 eth1
    192.168.1.0     *            255.255.255.0   U     0      0     0 eth1
    24.65.182.0     *            255.255.255.0   U     0      0     0 eth0
    127.0.0.0       *            255.0.0.0       U     0      0     0 lo
    default         24.65.182.1  0.0.0.0         UG    0      0     0 eth0

  ŁAOlbg[NƓlbg[NA[JfoCXAʂ
  255.255.255.255u[hLXgAhXAftHǧoHC^[
  lbgvoC_̃Q[gEFC֌AȂǂ̐ݒ肪I܂B
  B

  Olbg[NƁAēlbg[Nł܂BƂ͗҂̊
  ̔J邾łBŏɁAO爫zNłȂ悤
  ɂ܂傤B

  3.4.  Sm

  ADSLP[uŃC^[lbg֏펞ڑƁAȂ̃Rs[^
  @24ԁAT7ԁAݓIȋЂɂ炳Ƃ_
  ܂BLinuxQ[gEFCɍ̗pƁÃRs[^BƂ
  ܂A댯͌܂BȂƂÕC^[lbgڑ
  ̂́AȂLinux {bNXłB܂肠Ȃ̃lbg[N
  ŚALinux{bNẌS荂Ȃ邱Ƃ͂܂B
  ́AȂLinuxRs[^̈Sɍ߂邽߂̊{Iȃq
  g2E3Љ܂B

  ܂Azߏo˂΂Ȃ܂Bt@C/etc/hosts.denyҏW
  Aȉ̂悤ɂ܂B

  #
  # hosts.deny  This file describes the names of the hosts which are
  #             *not* allowed to use the local INET services, as decided
  #             by the '/usr/sbin/tcpd' server.
  #
  #            The portmap line is redundant, but it is left to remind you that
  #        the new secure portmap uses hosts.deny and hosts.allow. In particular
  #             you should know that NFS uses portmap!
  ALL: ALL

  ŁA"TCP wrapper"́AׂẴzXĝׂĂ̐ڑۂ܂
  (Ȃ݂"TCP wrapper"͊O̐ڑ95%𐧌䂵Ă܂)B΂炵
  [łBł́AȂ̃z[lbg[NA
  LinuxRs[^֐ڑł܂Bł͍܂Bň̗O
  ݂܂B /etc/hosts.allowҏWAȉ̂悤ɂĂB

  #
  # hosts.allow  This file describes the names of the hosts which are
  #              allowed to use the local INET services, as decided
  #              by the '/usr/sbin/tcpd' server.
  #
  ALL: 127.0.0.1
  ALL: 192.168.1.

  "TCPbp["ׂ͂ẴT[rXɂāA[JfoCX(127.0.0.1)
  Ȃ̃z[lbg[Nׂ̂ẴRs[^(192.168.1.)炾
  ڑ܂B

  ŁAȓ싞āAzߏo܂BƎ
  ߂邽߂ɓSiqƌxVXe~΁AɋÂȂ΂Ȃ܂
  BȂLinux Rs[^̈SɂĂƊwт̂ł
  ΁ASecurity HOWTO n߂Ă݂̂ǂł傤(:a
  )B

  4.  IP}XJ[h̐ݒ

  悭ł܂B͊łB͖@n܂܂BIP}XJ
  [h́A Linux񋟂{ɖ@̂悤ȃT[rẌłBl̋@
  \pi Windowspɂ܂A̖ʂł͑ɂyт܂
  BIP}XJ[hȂAiƂ386}VŒK̓ItBX
  lbg[NŜɃT[rX񋟂邱Ƃł܂BWindows
  95386}Vœł܂񂵁A܂ă}XJ[hpbP[Wǉ
  邱ƂȂǕs\ł(ŋ ǂ񂾋LɂƁA Windows 2000̓AhI
  \tgȂŋLڑɑΉĂ܂BLڑp\tgEFA𔄂Ă
  Ƃ̓}CN\tgɕ͂Ă悤łBA 386Windows
  2000gƂ͂߂ł܂)B

  Linux̃t@CA[EH[O@\͂ƂĂlłBł͉\Ȕ͈
  ŁAƂPƂȂ@ŎgĂ݂܂BƂ̂
  m肽΁AFirewalling HOWTO(: a󂠂܂)IPChains
  HOWTO𗼕 ǂłBO҂͗_A҂́AVt@CA
  [EH[̃c[ŁALinux2.2.XJ[l(Red Hat6.X)ɕtA
  ipchains܂B܂IP Masquerading HOWTO(: a󂠂܂) 
  }XJ[h̏ȉǂɂďڍׂɉĂAƂĂǂ
  B

  Ǔlbg[NƊOlbg[N̉^pn߂Ă܂΁AP
  }XJ[h̐ݒ́AƂĂAƂĂAȒPłBt@C
  /etc/rc.d/rc.localҏWAȉ̍st@C̍ŌɒǉĂ
  B

  # 1) Flush the rule tables.
  /sbin/ipchains -F input
  /sbin/ipchains -F forward
  /sbin/ipchains -F output
  # 2) Set the MASQ timings and allow packets in for DHCP configuration.
  /sbin/ipchains -M -S 7200 10 60
  /sbin/ipchains -A input -j ACCEPT -i eth0 -s 0/0 68 -d 0/0 67 -p udp
  # 3) Deny all forwarding packets except those from local network.
  #    Masquerage those.
  /sbin/ipchains -P forward DENY
  /sbin/ipchains -A forward -s 192.168.1.0/24 -j MASQ
  # 4) Load forwarding modules for special services.
  /sbin/modprobe ip_masq_ftp
  /sbin/modprobe ip_masq_raudio

  Ō2s̓J[lW[ǉAFTPRealAudiolbg[
  ÑRs[^ŗpł悤ɂ܂BKvȂΑɂA
  ̓ʂȃT[rXɂĈȉ̂悤ȃW[Aǉ邱Ƃ
  ł܂B

  o  CUSeeMe (/sbin/modprobe ip_masq_cuseeme)

  o  Internet Relay Chat (/sbin/modprobe ip_masq_irc)

  o  Quake (/sbin/modprobe ip_masq_quake)

  o  VDOLive (/sbin/modprobe ip_masq_vdolive)

  Ń}XJ[hƂł܂BR}h/etc/rc.d/rc.localŃX
  Nvgrc.local𑖂点āA͊łB̃Rs[^ŃEFbu
  T[tBĂ݂܂傤B\Ȃ͂łB

  5.  QΉ

  ̂悤ɊȒPȕɂĂƁA{ɁȀʂŕʂ
  i܂ȂƂ܂Bʂȏꍇ܂ˁB\Ƃ
  ́AÕlbg[NfoCX̐ݒő̖肪܂B
  ̂悤Ȗ肪lɂǂwEƂƂɉ̎
  ׂ̂邽߁A̕ɏǉ܂BCy
  pramsey@refractions.net֌AB

  5.1.  ICQ삵Ȃ

  }XJ[hłAꕔICQ͐ɓ삷邱Ƃ܂B
  ȊO͂܂삵܂Bbeta quality ICQ moduleJłB}
  XJ[fBOICQ𓮂ۂׂ̌ɂāAׂĂł͂܂
  ̈ꕔɂĎgł܂B܂\[XR[hƈꏏɔzz
  READMEt@Cɂ́AW[̃RpC@Ă܂BR
  pCCXg[A /sbin/modprobe ip_masq_icqsĂ
  B

  5.2.  Red Hat 6.XłȂCaldera 2.X̏ꍇ

  ܂́AsɂȂтȂȂɊtBƂNelson
  Gibbs(ngibbs@pacbell.net) ǂj[X𑗂Ă܂BCaldera
  2.X[U[̊F񂪒mĂƂȏłBdvȕύX_
  ܂B

  1. t@C/etc/sysconfig/network-scripts/ifcfg-eth0
     /etc/sysconfig/network-scripts/ifcfg-eth1GATEWAY=xxx.xxx.xxx.xxx
     LĂ(lbg[NC^[tF[X̃t@Cɂ͊O
     lbg[NɐڑC^[tF[X IPAhXw肵AO
     lbg[N֐ڑC^[tF[X̃t@Cł̓voC_[
     Q[gEFCIPAhXLĂ)B

  2. ܂t@C/etc/sysconfig/daemons/dhcpd̒ŁAeth0łȂ eth1Ƃ
     ROUTE_DEVICEݒ肵ĂB

  3. t@C/etc/dhcpd.confŁAǂ̃lbg[NC^[tF[Xɂ
     Tulbgݒ肵ĂBTulbg̎w肪Ȃ
     DHCPT[o[̓G[o܂BƁAȂ2Ԗڂ̋Lq(Iv
     VȂ subnet 216.102.154.201 netmask 255.255.255.255 {
     })DCHPT[o eth0eth1őMsAƗĂȂ
     ̂łB

  4. /etc/rc.d/init.d/dhcpdXNvgt@C host route
     255.255.255.255 ǉȂłBẴt@C
     eth0ƏĂ镔ׂeth1֏ĂB

  5.3.  lbg[ÑRs[^WebT[o[ɂ

  lȂłBIPAhXÓIȂΗeՂɓlbg[N
  ̃Rs[^WebT[o[ɂł܂BIPAhXIȂƂ́AAh
  XςƂɂ|[g]R}h֔f邽߃XNvg
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