  PPP for Linux
  Michael Callahan, callahan@maths.ox.ac.uk
  Al Longyera, longyear@netcom.com
  v1.0.1, June 1994
  ܂݂Ђ
  v1.0.1j, May 18, 1995

  ppp-2.1.2 ɕt README ̘a

  : ͂̕ȂȑOɏꂽ̂Ȃ̂ŁA܂ǂ Linux 
  ɂ͂Ă͂܂Ȃӏ܂B (JF Project)

  1.  ͂߂

  1.1.  Cg_NV

   Linux p PPP hCołB̐lgĂA߂Ĉ
  Ă悤Ɍ܂B̃hCo 'NCAg' -- Ⴆ Linux
  }VgăC^[lbgvoC_Ɛڑ -- ƂĂg
  A' T[o[' -- fƃC^[lbgɂȂC[Tlbg
  Ă Linux }Vgă_CAEC PPP ڑ -- Ƃ
  g܂B(ۂ̂ƂAPPP ̃vgRɂ̓NCAgƃT[o[
  ̋ʂ͂܂񂪁Â悤ɐ킩₷ł傤)

  PPP vgR 2 ̕łĂ܂B̓f[^t[
  pPbgɕޕB LCP, IPCP, UPAP, CHAP ƌĂ΂v
  gR̕ŁAڑ̃IvVƂ肵F؂肵܂B
  ̃pbP[Wl 2 ̕oĂ܂B PPP ̒჌x
  ̃t[~OvgRsJ[lW[A pppd 
  Ă΂郆[U[x̃vOŁA PPP ̐ڑsvgR
  Ă܂B

  J[lW[ PPP ̃t[/AG[oAV
  A|[gƃJ[l̃lbg[NR[hA邢̓[U[x̃v
  Oł pppd Ƃ̊ԂŃpPbĝs܂BIP pPbg
  ڃJ[l̃lbg[NR[hɑ܂̂ŁApppd ͂ڑ
  ΁AڑI܂ŊSȋxԂɓ܂BڑI
  鎞ɍēx pppd ͖ڊo߂āAڑ𐳂I܂B

  1.2.  쌠\

  (MJC)IWĩJ[lhCo 0 珑܂B
  Laurence Culhane tol Fred van Kempen  slip.c MdȃfɂȂ
  (̏vOnǂ slip.c ^Ă鏊X
  Ƃ킩ł傤)BȂA pppd ɕKvȋ@\ RFC1331
  KChɂĎ܂BLinux p̃hCo͑啔 386BSD  SunOS
  pƓC^[tF[XgĂ܂BقȂ_́ALinux ͔񓯊 I/O
  T|[gĂȂƂłBA ioctl nbNāAp
  Pbg PPP T|[gJ[lW[VOio
  ɂāApppd ɂ̃VOig悤ɂ܂B

  Al Longyear  pppd ̃o[W 2.0.4  (ppp-2.0.4 ̃t[ȃpb
  P[W)ڐA܂Bނ͂܂AJ[lhCo pppd  OS 
  ƗĂ镔ɂāA̋@\s܂BLinux  PPP
  ɑ΂ނ̍v͂߂đȂ̂ŁÃ[X͎̘AōsȂ
  Ă܂B

  pppd vO Paul Mackerras eiXĂ Sun  386BSD
  p̃t[ PPP vO܂B̃pbP[Wɂ́Aȉ
  lXւ́uӁvqׂĂ܂B

  Brad Parker, Greg Christy, Drew D. Perkins, Rick Adams and Chris
  Torek.

  1.3.  ̗\

  Ăvȋ@\́A[gzXgւ̃pPbgꂽɎ
  I PPP ̐ڑs@\ł("f}hE_CO")B̌Ɋ
  Ă݂͌ƒłA򖖂ȃfUC̖肪cĂ
  B

  2.  CXg[

  ̃o[W PPP  1.0.x (x=0..9)  1.1.x (x=0..14) J[lŃe
  XgĂ܂B[eBÕR[hύXĂ邽߁AȑO
  ̃J[lł͂܂Ȃł傤BAÂo[W̃J[l
  gĂȂAAbvO[hĂB

  2.1.  linux-activists  PPP `lւ̏ҁF

  ̓Cg[ɂ͒ڊ֌W܂񂪁A Linux PPP 悭g
  ȂAPPP ̃[OXg֎QĂBQ邽߂ɂ́A

       X-Mn-Admin: join PPP

  Ə[ linux-activists-request@niksula.hut.fi ɑ܂B
  [OXg֓eɂ́A linux-activists@niksula.hut.fi ցA{
  ̍ŏ

       X-Mn-Key: PPP

  Əđ܂B

  ̃[OXgɎQƁAPPP ɊւAbvO[hpb`
  Ă̏񂪓܂A PPP ̃xěo𕷂Ƃ
  \ł傤B肪N΁Agff邱Ƃł܂A
  Ă̖͒Nɉς݂łB

  ӂė~̂łA Usenet  linux ֘Ãj[XO[v
  Iɓǂł킯ł͂Ȃ̂ŁAKňׂ PPP Ɋւ
  c_ɂ͂Ă܂B PPP ɂēɋc_ꍇA
  linux-activists  PPP `lɎQĂB

  PPP ̃[OXg甲ɂ :-( A[̖{

       X-Mn-Admin: leave PPP

  Ə linux-axtivists-request ܂őĂB

  e邽߂ɂ́AQ̃AhXƐmɓAhXgĂ
  BȂ킿AAJEgAzXgAVXełȂ΂Ȃ
  ܂B

  2.2.  J[lhCõCXg[F

  ́AgĂJ[l̃o[WɈˑ܂B

  1.1.14 ́APPP ̃T|[g Linux ̃J[lɑg݂܂܂B
  PPP gǂ "make config" ̍ۂ Y  N œ܂B

  āAāÃpbP[W̃t@CJ[l̂̂ƓꂩĂ
  ܂BJ[l͏ɂ̃pbP[WɊ܂܂Ăt@CV
  ̂gĂ܂B

  1.1.13 ł PPP ɊւR[h͂܂Aconfing.in  PPP Ɋւ
  鍀ڂ̓RgAEgĂ܂B 1.1.13 gĂȂA
  AbvO[hł傤B

  1.1.13 ȑÕJ[lł (SĂ 1.0.x ̃J[l܂߂)AԁA
  PPP ɊւR[h̓T|[gĂ܂AJ[l̐ݒ̍ۂɂ͉B
  Ă܂BPPP ̃J[lhCog݂ނƂ͊ȒPłF

  1. ̃pbP[WɊ܂܂Ă ppp.c  drivers/net ɃRs[Appp.h
      include/linux ɃRs[܂B

  2. config.in  CONFIG_PPP ̍s̃RgO܂B

  3.  1.1.3 ȑO(1.0.x ܂߂)̃J[lgĂȂF ppp.c
      /* #define NET02D Ŏn܂s "/*" 폜āARgAEg
     O܂B

  4. J[l\[X̃gbvfBNg (Ă /usr/src/linux) 
     A

       make config
       make dep
       make

  s܂B

  VJ[lŃu[gĂBNɈȉ̂悤ȃbZ[W
  o͂͂łF

       PPP: version 0.2.7 (4 channels) NEW_TTY_DRIVERS OPTIMIZE_FLAGS
       TCP compression code copyright 1989 Regents of the University of California
       PPP line discipline registered.

  ŏ̍s̑啶̕قȂĂĂCɂKv͂܂B

   4 `lȏ PPP ŎgꍇAq ``PPP `l
  ₵''QƂĂB

  ɁA/proc/net/dev ̒gĂ݂܂傤BȕɂȂĂ͂
  B

  Inter-|   Receive                  |  Transmit
   face |packets errs drop fifo frame|packets errs drop fifo colls carrier
      lo:      0    0    0    0    0        0    0    0    0     0    0
    ppp0:      0    0    0    0    0        0    0    0    0     0    0
    ppp1:      0    0    0    0    0        0    0    0    0     0    0
    ppp2:      0    0    0    0    0        0    0    0    0     0    0
    ppp3:      0    0    0    0    0        0    0    0    0     0    0

  ȂĂ΁AhCo͐CXg[Ă܂B

  (A܂ȂĂAPPP gȂ΃J[l
  ɂ͖͂܂)

  2.3.  pppd ̃CXg[F

   pppd ăRpCȂApppd TufBNgֈړāA

       ln -s Makefile.linux Makefile
       make

  Ƃ܂Blcp.c  upap.cAchap.c RpCۂɂ[j
  ObZ[Wo邩m܂񂪑vłB

  chat ăRpĆAchat ̃fBNgɂ README.linux
  `FbNĂB

  CXg[ɂ́Achat  pppd ꂼ̃fBNg 'make
  install' ܂B chat  pppd ̃oCi /usr/etc ɃC
  Xg[Apppd.8 ̃}jA /usr/man/man8 ɃCXg[
  B

  pppd ̓[ǧŎsȂ΂܂B[g setuid 
  A[gɂȂĎsĂB'make install' ΁AI
  [g setuid 悤ɂȂĂ܂B[U[lȂ}V
  ł setuid ̂֗łÃ[U[g}VɃCXg[
  ۂɂ̓ZLeB̖\Ƀ`FbNĂB

  3.  lbg[N̊T

  ̐l PPP ŏ߂ Linux ̃lbg[ÑR[hgƂɂ
  ̂ŁÃZNVł̓lbg[N𗘗p邽߂ɕKvȂƂ̊T
  ܂BIɂ́Ȁ͂Ő邱Ƃ PPP Ǝ̂̂ł͂
  ܂BڍׂɂẮA֌W Linux ̊e HOWTO QƂĂ
  Blbg[N̐ݒ\ĂȂȀ͔͂
  Č\łB

  ܂ŏɃ`FbNׂt@ĆANɃlbg[N̐ݒs
  Ȃ rc XNvgłB̃t@C͎gĂ Linux ̃fBXg
  r[VɂđO͈قȂĂ܂A /etc/rc.net 
  /etc/rc.d/rc.net.{1,2} ̂悤ȖOɂȂĂ܂B̃t@CŁA
  [vobNC^[tF[X lo  'ifconfig' āÃC^[tF[
  Xɑ΂oHݒ肵܂B̍s͂ȕɂȂĂ͂łB

  $CONFIG lo 127.0.0.1
  $ROUTE add loopback

  邢

       /sbin/ifconfig lo 127.0.0.1
       /sbin/route add 127.0.0.1

  ȂAC[TlbgJ[hCXg[Ă鑼̂ǂȌoH
  (route)ݒ肵Ă *܂* (ۂɃC[TlbgJ[h
  ̂łȂBC[TlbgJ[hĂȂAǂׂ
  䑶m̂ƂƎv܂)B̃fBXgr[VC[Tlbg
  Ăꍇ̐ݒ񋟂Ă܂B

  ܂AO telnet/ftp/finger ǂ߂ȂƂ܂
  BȂArc ̋NXNvg̒ 'inetd' f[𓮂
  B

  ɁA/etc/hosts CāA 2 s܂Bŏ̂̂̓[v
  obNAȂ킿g̃[JzXgƂẴAhXŁA 2 ߂
  ͎̂ۂ PPP ڑ̍ۂɎgzXgl[ IP AhXłBႦ
  ΁A

       127.0.0.1  loopback localhost   # useful aliases
       192.1.1.17  billpc.whitehouse.gov bill  # my hostname

  ̂悤ɂ܂B̗ł́A̎g IP AhX 192.1.1.17 ŁA
  zXg̖O billpc.whitehouse.gov ƂȂ܂(kł)B
  g PPP T[o[I IP AhX̊蓖ĂɑΉĂ
  ȂAۂɊ蓖Ă IP AhX͐ڑɌ肳邱ƂɂȂ
  (q "``IAhX蓖''" )B

  ŌɁA/etc/resolv.conf K؂ɒ`ăhCl[VXeݒ
  ܂B/etc/resolv.conf ͂Ȍ`ɂȂ܂B

       domain whitehouse.gov
       nameserver 192.1.2.1
       nameserver 192.1.2.10

  l[T[o[ 192.1.2.1  192.1.2.10 Ɖ肷ƁAPPP Őڑ
  ꍇAȃzXg 'hillarypc.whitehouse.gov'  '
  chelseapc.whitehouse.gov'ƂzXg 'hillarypc'  'chelseapc'
  ƌŃANZX邱Ƃł܂BK؂ȃhCgl[T[
  o[ IP io[Ȃǂ PPP ̐ڑɖ₢킹ĂB

  4.  PPP T[o[Ƃ̐ڑ

  PPP gۂɂ́Apppd vOK؂ȃIvVċN
  BmׂƂׂĂ pppd(8) ̃}jAy[Wɂ܂B
  A̗ĂƂ͗Lvł傤B

  4.1.   1FȒPȃ_CAAbvڑ

  foR PPP T[o[ɐڑꍇÂ悤ȃR}hg
  ܂B

       pppd connect 'chat -v "" ATDT5551212 CONNECT "" ogin: ppp word: whitewater' \
             /dev/cua1 38400 -detach debug crtscts modem defaultroute 192.1.1.17:

  pppd ̃IvVɌĂ݂܂傤B

     connect 'chat etc...'
        ̃R}h PPP T[o[ƐڑJn܂BŎgĂ
        'chat' ƂvOŃ[g̃Rs[^ɓdb
        B'connect' R}hɈ̈Ȃ߁AR}
        hŜVONH[g(')ŊKv܂B'chat' g̃I
        vV́A

          -v 璷[hF syslog ɋL^c܂
          ""           F vvg҂ɁAA
          ATDT 5551212 F fɃ_CAR}h𑗂A
          CONNECT      F Ԏ҂āA
          ""           F ^[R[h𑗂( 0 ̕
                          ʏ̃^[R[h)A
          ogin: ppp word: whitewater OC܂B

     /dev/cua1
        ̓VA|[g cua1 gƂw܂B

     38400
        ̓{[[g̎wB

     -detach
        ʏApppd ̓tH[NĎgobNOEhŎs܂
        ÃIvVƂȂȂ܂B

     debug
        e̋L^ syslog Ɏc܂B

     crtscts
        Rs[^ƃf̊Ԃn[hEFAt[Rg[Ƃ܂
        (38400 ̃{[[gł͂Ȃ΂܂)B

     modem
        ffoCXgƂw܂G̃IvVw肷
        ƁA pppd ͓db̑OŉnOAbv܂B

     defaultroute
         PPP ̐ڑmAftHǧoH (default
        route)Ƃ܂G PPP g Internet ɐڑƂ
        ΁A邱ƂړIłB

     192.1.1.17:
        ͐ȃIvVł x.x.x.x:y.y.y.y ȗ`łB
         x.x.x.x ̓[J IP AhX y.y.y.y  PPP ڑ
        [g[ IP AhXɂȂ܂B̃IvVw肳
        ȂA(̗̂悤)Бw肳ꂽAx.x.x.x 
        /etc/hosts ɂ郍[J}ṼzXg IP AhXgp
        Ay.y.y.y ̓̕[g̃}VŌ肳܂BłA
        ŏqׂĂˋ̃}VA'billpc' ̏ꍇA̎w͎ۂɂ
        璷Ȃ̂łB

  pppd ̓G[bZ[WƃfobOo͂ syslogd f[ "local2" 
  Oŏo͂܂(chat  -v IvVŋNl)B
  ̃bZ[W͂炩߃R\[ /usr/adm/messages Ƃt@C
  ɏo͂悤ɂȂĂ邩m܂GǂݒɂȂĂ
   /etc/syslog.conf t@CĂB pppd  chat ̃b
  Z[WSăR\[ɏo͂΁Asyslog.conf t@C

       local2.*                /dev/console

  Ƃs܂B"local2.*"  "/dev/console" ̊Ԃ 1 ȏ TAB
  R[hKvȂƂɒӂĂB

  4.2.   2Fpg PPP T[o[ɐڑꍇ

  ͂GȗłBɎ̂AMorningstar  PPP 
  Ă Ultrix }Vɒڐڑꂽ Gandalf  PPP ڑ邽߂Ɏ
  gĂXNvgłB

       pppd connect /etc/ppp/ppp-connect defaultroute noipdefault debug \
             kdebug 2 /dev/cua0 9600

  ŁA/etc/ppp/ppp-connect ͂ȃXNvgɂȂĂ܂F

       #! /bin/sh
       /etc/ppp/sendbreak
       chat -v -t60 "" \; "service :" blackice ogin: callahan word: PASSWORD \
           black% "stty -echo; ppp" "Starting PPP now"  && sleep 5

  ܂ break M𑗂A^[~iT[o[N܂BɃZ~R
  𑗂(̎gĂ^[~iT[o[ł̓Z~RŃ{[[g
  Is܂)A"blackice" ƂT[rXv܂BOC
  āA"black%" ƂVF̃vvgô҂A PPP N
  B-t60 Ƃ̓^CAEg܂ 1 ԂAƂӖłB
  XÃVXe͂߂ĒxȂ邱Ƃ̂ŁB

  "&& sleep5" ŃXNvg 5 bԒ~܂Ał chat s
  ꍇAɏI܂B PPP T[o[ɋN鎞Ԃ^
  ܂(ƂĂx̂)B܂A"stty -echo" ƂIvV͎ɂƂ
  Ă߂ďdvȈӖĂ܂G̃IvVȂƁA[
  g PPP T[o[GR[ItɂȑOɁA茳 pppd lSVG[
  Vp̃pPbg𑗂Ă܂Ƃ܂ɂ邩łB[g
  PPP T[o[GR[ItɂĂȂԂŃlSVG[VEpPbg
  𑗂ƁApPbg͂̂܂܎茳̃}VɋAĂĂ܂Aۂ
  ܂܂(PPP ̓[vobNoł܂)BāA[g PPP
  ̏łOɎ茳 pppd ̓G[IĂ܂܂B" stty
  -echo" IvV͂h܂B̖̎́Ax Unix }V
  PPP T[o[ɂĂ邲͂̐lXɂNȂƂł傤A
  ܂łɎԂ̂ŁAĂŌyĂ܂B

  ̑ pppd ̃IvV͂悭̂łB"noipdefault"  "kdebug
  2" ƂIvVV̂ł傤B" noipdefault" IvV
  w肷ƁApppd ͎gׂ IP AhX[gɖ₢킹܂G
  ̏ꍇ̂悤ɁAPPP T[o[ IP AhX̓I蓖ċ@\
  ÃIvVKvƂȂ܂(Ȃ킿AOɂǂ̃AhXɂȂ
  ͂킩Ȃ)B"kdebug 2 "ƂIvV́AJ[l̃fobOx
   2 ɐݒ肷̂ŁAJ[l ppp ɊւR[h̏o͂
  ڂȂ܂B

  ɂAڑƂłƂ΁Achat fɓdb
  A pppd 炢̃bZ[Wo͂(syslog.conf ̐ݒɉ
  )ǍAȃJ[l̃bZ[Wo͂͂łB

       ppp: channel ppp0 mtu changed to 1500
       ppp: channel ppp0 open
       ppp: channel ppp0 going up for IP packets!

  (̃bZ[W "kdebug 2" IvVtAkern.info bZ[W
  ڃXN[ɏo͂悤ȐݒɂȂĂꍇɂ̂ݕ\
  ) ɁApppd ͊֌W郁bZ[W /usr/adm/messages
  (syslong.conf ̐ݒɂĂ͕ʂ̃Ot@Cm܂)ɏo͂
  ܂B

  5.  eXgƃguV[eBO

  5.1.  ܂ȂAA

  ܂ڑł悤ȂAeXg@͂ς܂B

  ܂ɁA

       /sbin/ifconfig

  ƃ^Cv܂(ƁAgĂVXeɂĂ ifconfig 
  /sbin ȊȌꏊɂ邩m܂)B̃R}h ' UP' ̏Ԃɂ
  SẴlbg[NC^[tF[X\܂B ppp0 ̒ɂ
  ͂ŁAŏɎꂽ IP AhXȂĝ́A" POINT-TO-POINT
  ADDR"ŎĂ̂T[o[̃AhXłB̃}Vł͂ȕ
  ɂȂ܂B

       lo        Link encap Local Loopback
                 inet addr 127.0.0.1  Bcast 127.255.255.255  Mask 255.0.0.0
                 UP LOOPBACK RUNNING  MTU 2000  Metric 1
                 RX packets 0 errors 0 dropped 0 overrun 0
                 TX packets 0 errors 0 dropped 0 overrun 0

       ppp0      Link encap Point-Point Protocol
                 inet addr 192.76.32.2  P-t-P 129.67.1.165  Mask 255.255.255.0
                 UP POINTOPOINT RUNNING  MTU 1500  Metric 1
                 RX packets 33 errors 0 dropped 0 overrun 0
                 TX packets 42 errors 0 dropped 0 overrun 0

  

       ping z.z.z.z

  Ƃ܂BŁAz.z.z.z ͎gĂT[o[̃AhXłB͑
  vȂ͂łB̏ꍇAȕɂȂ܂B

       waddington:~$ ping 129.67.1.165
       PING 129.67.1.165 (129.67.1.165): 56 data bytes
       64 bytes from 129.67.1.165: icmp_seq=0 ttl=255 time=268 ms
       64 bytes from 129.67.1.165: icmp_seq=1 ttl=255 time=247 ms
       64 bytes from 129.67.1.165: icmp_seq=2 ttl=255 time=266 ms
       ^C
       --- 129.67.1.165 ping statistics ---
       3 packets transmitted, 3 packets received, 0% packet loss
       round-trip min/avg/max = 247/260/268 ms
       waddington:~$

  

       netstat -nr

  Ƃ܂B΁Aȕ 3 ̌oH͂łB

  Kernel routing table
  Destination     Gateway         Genmask         Flags Metric Ref Use    Iface
  129.67.1.165    0.0.0.0         255.255.255.255 UH    0      0        6 ppp0
  127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
  0.0.0.0         129.67.1.165    0.0.0.0         UG    0      0     6298 ppp0

  ɂȂĂĂADestination  0.0.0.0 ƂsȂ
  ꍇ(̍sڑ̃ftHǧoHƂȂ܂)Apppd  '
  defaultroute' IvVĂȂ\܂B

  ܂ŊmFł΁Atelent/ftp/finger AłDȂ̂gĂ
  ĂBA/etc/resolv.conf 𐳂ݒ肵ĂȂꍇA (z
  XghCł͂Ȃ)A̎w͐ IP AhXgȂ
  ΂ȂȂƂɒӂĂB

  5.2.  _AA

  linux TufBNgɂ悭ɂĂ̒Z FAQ pӂ܂
  B

  ڑłȂ悤ȂApppd  'debug' `FbNĂ
  B̂߂ɂ pppd  'debug' IvVtŋN
  āA/etc/syslog.conf t@C

       local2.*                                        /dev/console
       local2.*                                        /usr/adm/ppplog

  ƏĂKv܂B

  Ă΁Apppd ̃bZ[WgĂR\[
  /usr/adm/ppplog ̑oɏo͂܂B̗("local2.*") ƉE̗
  ("/dev/console", "/usr/adm/ppplog") ̊Ԃɂ͈ȏ TAB R[h
  ĂȂƂ܂B/etc/syslog.conf CAsyslogd ̃v
  ZXio[w肵āA'kill -HUP <syslogd  pid>' sA
  Ă syslogd ɐݒt@Cǂ݂܂܂B

  ƁAȉ̂悤ȃbZ[W\͂łB

  o  "pppd[NNN]: Connected..."
     "connect" XNvgI܂B

  o  "pppd[NNN]: sent [LCP ConfReq"...
     pppd ̓[gƃlSVG[VJn܂B

  o  "pppd[NNN]: recv [LCP ConfReq"...
     pppd ̓[glSVG[Vp̃t[M܂B

  o  "pppd[NNN]: ipcp up"
     IP gtBbNʂ߂̐ڑm pppd ͉߂܂

   "recv" bZ[WoȂꍇAڑ̂̂ɏdȖ肪Ă
  ܂(Ⴆ 8 rbgSĂ𐳂ʂĂȂƂ)B̏ꍇAȂ
  Rs[^ƃ[g PPP T[o[Ƃ̊Ԃʉ߂SẴf[^
  fobOEOt@CɏĂ̂ɖ𗧂܂B邽
  ߂ɂ́Asyslog.conf t@C

       local2.*,kern.*                         /dev/console
       local2.*,kern.*                         /usr/adm/ppplog

  ƏAƓ悤 syslog f[ HUP VOi𑗂܂B
  āApppd  "kdebug 5" IvVċN PPP ̐ڑ
  ꂽSẴLN^[fobOo͂ɏ܂B

  AȃbZ[Wo邱Ƃ܂B

       ppp_toss: tossing frame, reason = 4

  ̃bZ[W̓VÃI[o[̂߁APPP R[h[g
  T[o[̃pPbg("t[")̂ĂĂ邱ƂӖ܂B
  bZ[WoꍇAȂ̃Rs[^ CPU ͔\͕sŁAVA
  |[gɃLN^͂Ăǂݏo܂łɎԂĂ܂G
  P̉@̓VA|[g 16550A `bvgƂłB̃`bv
  obt@ĂACPU ɓǂݏo߂̎ԓI]T^܂B"
  reason =4" ȊȌꍇ́ANׂł͂ȂVÃG[N
  邱ƂӖĂ܂B

  ڑ̍ŏ̒iKł́A"bad fcs" ƂbZ[Wxo邩m
  B͎󂯂Ƃ PPP t[̃`FbNTEG[ӖĂ
  ܂BꂪN̂́AĂAڑ̊JnɃ[g̃VXe
   "eLXg" bZ[WAႦ " hello this is the XYZ company" 
  ĂꍇłBڑmAoH " bad
  fcs" ƂbZ[Wô͐ȂƂł͂ȂA`̃G[d
  b̃mCYӖ܂B

  5.3.  ł_ȂAA(oO|[g)

  ł܂Ȃ΁Alinux-activists  PPP `lɃoO
  |[g𑗂ĂB\Ȍ葽̏񂪓Ă邱Ƃ̗v
  BKvȏ̗ƂāA

  o  gĂJ[l̃o[W

  o  gĂ Linux PPP ̃o[W

  o  PPP ZbVJn̂ɎgĂR}h

  o  syslog.conf t@C local2.*, kern.* w肵ēꂽ 'debug'
     o

  o  ڑ PPP ̎(Ⴆ Xyzzy Corp ̃^[~iT[o[A[j
     OX^[ PPP \tgAȂǂȂ)

  o  ڑ`(fApAȂǂȂ)

  6.  ǉݒ

  6.1.  IAhX蓖

  Linux  PPP ͐ڑ邽тɈقȂ IP AhX蓖Ă PPP
  T[o[Ƃڑ邱Ƃł܂B IP AhX肠ĂĂ炤悤
  Ƀ[gzXgփNGXgoɂ 'noipdefault' IvVg
  ܂B

  Linux ̃NCAg(Ⴆ "talk" Ȃ)gꍇA" Cannot assign
  requested address" ƂG[bZ[Wo邱Ƃ܂B
  /etc/hosts ɋLqĂ鎩g IP AhX PPP C^[tF[X
  Ɋ蓖Ăꂽ IP AhXقȂ邩łB@́A ifconfig ppp0
  ƂĎgĂC^[tF[X̃AhX`FbNA/etc/hosts 
  CĂɍ킹邱ƂłB

  6.2.  PPP ڑ󂯂鑤̃ZbgAbv

  ̃}V炠Ȃ̃}VĂт PPP ڑAƂ킯
  ˁB Linux PPP ł͉\łB

  ܂ɁAȂ Linux }VVAČďoɐ
  āAOCEvvgoĂ邩mFĂBmF邽
  ߂ɂ́AȂ̃}V֓dbāAʂ̃[U[ƂăOCA
  VFvvgƏoāAeR}hg邩`FbN
  ĂB̕ł Linux }VAĂdbɓ悤
  ɃZbgAbv@ɂĂ͈܂BɂẮAVXe
  ɕ̕A邢 Serial HOWTO ({) QƂĂB

  ɁAPPP T[rX񋟂ł悤ɂ܂B̕@́AႦ '
  ppp' ƂAJEgAOCɋNVF pppd 
  N邽߂̒ZXNvgɂ邱ƂłB̕@ꍇA
  /etc/passwd ɂȃGgǉ邱ƂɂȂ܂B

       ppp:(encrypted password):102:50:PPP client login:/tmp:/etc/ppp/ppplogin

  NĂ /etc/ppp/ppplogin ͂Ȏs\ȃVFXNvg
  B

       #!/bin/sh
       exec /usr/etc/pppd passive :192.1.2.23

  [󒍁FfoRŎgȂ modem IvVtȂƐ hang up
  ȂƂ܂B]

  ̐ݒł́A[g̃}V(ڑĂ}V) IP AhX
  192.1.2.23 ŁAPPP C^[tF[Xg[J(zXg) IP A
  hX /etc/hosts ɏĂ}VɑΉ IP AhXɂȂ
  B'passive' IvV (K{ł͂Ȃ̂ł)Apppd ͋N
  ɃlSVG[g悤ƂāAԎꍇ͂̂܂ܖقđ҂Ԃ
  Ȃ܂B[g̃}VlSVG[g̏ł܂łɑ̎
  ԂꍇÃIvVgƂł傤('passive' IvV
   ppp-1.3  ppp-2.0 ̊ԂŕύXĂ邱Ƃɒ)

  2 ̃}Vڑ邾Ȃ炱̃ZbgAbvŏ\łA Linux
  PPP gĊÕ}Vlbg[NƐڑꍇA邢 2 
  lbg[Nڑ悤ȏꍇɂ́Albg[N PPP ڑփp
  Pbg𑗂oHݒ肵Ȃ΂Ȃ܂Blbg[NԂ̐ڑ
  Ă̐ݒ͈͂̔͊̕OłGpppd ̌oHɊւIvV
  ɂāA}jAy[WڂǂŁArouted ȂǂɊւLq
  ĂB
  ł͍ŏ̏ꍇ݂̂l܂BC[Tlbgɐڑꂽ Linux }V
  āA PPP ŊOڑāAC[Tlbg̃}Vƒ
  MAƉ肵܂傤B̂߂ɂ́A[g̃}VɃ[J
  C[TlbgZOg̃}VƓ IP AhX^āAT[o[
  Ďg pppd  'proxyarp' IvVKv܂B
  ́Aȉ̂悤ȐڑlĂ݂܂F

        192.1.2.23                        192.1.2.17
       +-----------+      PPP link       +----------+
       | chelseapc | ------------------- |  billpc  |
       +-----------+                     +----------+
                                               |           Ethernet
                                   ----------------------------------- 192.1.2.x

  ̏ꍇAbillpc  PPP C^tF[XƃC[TlbgC^tF[X͓
   IP AhX 192.1.2.17 Ă܂(̃}VňA邢
   PPP C^tF[XC[TlbgEC^tF[XƓ IP Ah
  XƂ͉\ł)Bbillpc  /etc/passwd t@Cɂ
  chelseapc  /etc/ppp/ppplogin XNvgNł悤Ȑݒ肪
  ܂B/etc/ppp/ppplogin XNvg͂ȂĂ܂B

       #!/bin/sh
       exec /usr/etc/pppd passive proxyarp :192.1.2.23

  ڑJnƁApppd  chelseapc ւ̃Gg billpc  arp
  e[u "proxy arp" ƂĒǉ܂B΁A192.1.2.x ̃C[
  Tlbg̃}Vɑ΂āAbillpc (192.1.2.17) ̃C[TlbgEC
  ^[tF[X chelseapc (192.1.2.23) ł邩̂悤ɂӂ܂܂B
  邱ƂŁAchelseapc ڂɃC[Tlbgɐڑꂽ}V
  ̂悤ɒʐM邱Ƃ\ɂȂ܂B

  6.3.  PPP `l𑝂

  ftHgł Linux PPP  4 ̃J[l`lg悤ɂȂ
  ܂BȂ킿Aɍő 4  PPP ZbV\AƂƂ
  BAƑ̃ZbVKvȂ(Ⴆ΁Ã_CA
  ɃT[rX񋟂AȂ)AJ[l̃\[XR[hCāAV
  `lǉ邱Ƃł܂Bɂ 2 ̃Xebv
  B

  ɁAdrivers/net/Space.c ̃t@CC܂BzzĂ
  ł́Â悤ȕ͂łB

  #if defined(CONFIG_PPP)
  extern int ppp_init(struct device *);
  static struct device ppp3_dev = {
      "ppp3", 0x0, 0x0, 0x0, 0x0, 3, 0, 0, 0, 0, NEXT_DEV,  ppp_init, };
  static struct device ppp2_dev = {
      "ppp2", 0x0, 0x0, 0x0, 0x0, 2, 0, 0, 0, 0, &ppp3_dev, ppp_init, };
  static struct device ppp1_dev = {
      "ppp1", 0x0, 0x0, 0x0, 0x0, 1, 0, 0, 0, 0, &ppp2_dev, ppp_init, };
  static struct device ppp0_dev = {
      "ppp0", 0x0, 0x0, 0x0, 0x0, 0, 0, 0, 0, 0, &ppp1_dev, ppp_init, };
  #undef NEXT_DEV
  #define NEXT_DEV (&ppp0_dev)
  #endif   /* PPP */

  p^[͖łˁB`lǉɂ́A" static struct device
  pppN_dev" sǉāA\̂̍ŏ (ppp[0,1,2] 11 Ԗڂ̗vf
  (&ppp[1,2,3]_dev) K؂ɐݒ肵܂B PPP foCX̍Ō̂̂ 11
  Ԗڂ̗vf NEXT_DEV ɂȂ邱ƂɒӂĂBȊÕfoCX
  ł́A&ppp3_dev  &ppp4_dev ȂǂɕύX܂B

  ƂāA2 `lǉĂ݂܂傤B

       #if defined(CONFIG_PPP)
       extern int ppp_init(struct device *);
       static struct device ppp5_dev = {
           "ppp5", 0x0, 0x0, 0x0, 0x0, 5, 0, 0, 0, 0, NEXT_DEV,  ppp_init, };
       static struct device ppp4_dev = {
           "ppp4", 0x0, 0x0, 0x0, 0x0, 4, 0, 0, 0, 0, &ppp5_dev,  ppp_init, };
       static struct device ppp3_dev = {
           "ppp3", 0x0, 0x0, 0x0, 0x0, 3, 0, 0, 0, 0, &ppp4_dev,  ppp_init, };
       ... etc.

   (include/linux fBNgɂ) ppp.h t@C̈ȉ̍s

       #define PPP_NRUNIT     4

  ǉ`lɂ킹ĕύX܂B̗ł

       #define PPP_NRUNIT     6

  ƂȂ܂B

  ŁAJ[lăRpCu[g܂BÑbZ[W
  /proc/net/dev ύX𐳂Ă邱ƂmFĂB

  7.  LINUX PPP 0.1.x ̕ύX_

  Linux PPP 0.1.x ̓t[ɔzzĂ PPP pbP[W PPP-1.3 
  ɂĂ܂BALinux PPP 0.2.1  PPP-2.0.4 ɂĂ܂B
  ҂̊Ԃł pppd ̃IvVɑ̕ύXsȂAe̋@\
  Ă܂BύX_ɂĂ̏ڍׂ pppd fBNgɂ
  "RELNOTES" QƂĂB

  ܂APPP-1.3  Linux o[WɒǉꂽIvV̂͖
  OύXĂ܂B

  o  defroute  defaultroute 

  o  kerndebug  kdebug 

  o  dropdtr  modem ɁA

  ꂼύX܂B

  āA[J IP AhX[g PPP T[o[炤ꍇ
  ɂ 'noipdefault' IvVKvɂȂ܂B

  8.  _

  Good luck!

  Michael

  -----------------------------------------------------------------------
  OO(kojima@komae.denken.or.jp, isle@st.rim.or.jp)
   201 s ]s ˖k 2-11-1
  ()d͒ q[}t@N^[Z^[
  Tel:(03)-3480-2111(ex.649), FAX:(03)-3430-5779
  -----------------------------------------------------------------------

  (sgml conversion, y.senda, ysenda@pop01.odn.ne.jp, 2001/09)

