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Message-ID: <382DDD91.1F1438E@home2.>
Date: Sun, 14 Nov 1999 06:52:17 +0900
From: Motoya Kurotsu <kurotsu@violet.plala.or.jp>
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Subject: [IPv6-jp 339] Telnet/ftp via router fails
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$B$O$8$a$^$7$F!"9uDE$H?=$7$^$9!#(B

$B!!;d$N2<5-$N$h$&$J4D6-$G!"#1Bf$N%^%7%s(B(poulenc)$B$r(Bkame$B2=$7$F$_$^$7$?!#(B
$B!!$=$N%^%7%s$G(Binetd$B$H(Binet46d$B$NN>J}$,Av$C$F$$$k$H$-$O!"%k!<%?1[$($N(B
$B!!(Btelnet,ftp(mozart->poulenc)$B$H$b$KLdBj$J$,$C$?$N$G$9$,!"(Binetd$B$r$H$a(B
$B!!$F(Binet46d$B$@$1$rAv$i$;$k$H!"%k!<%?1[$($N(Btelnet,ftp$B$,$G$-$J$/$J$j$^$7(B
$B!!$?!#(Bping,traceroute$B$ODL$j$^$9!#%k!<%?(B(bach)$B$+$i$N(Btelnet,ftp$B$OLdBj$"(B
$B!!$j$^$;$s!#5UJ}8~(B(poulenc->mozart)$B$N(Btelnet,ftp$B$ODL$j$^$9!#(B

$B!!(Btcpdump$B$GD4$Y$k$H!"Aj<j@h(B(poulenc)$B$+$i$N1~Ez$,%k!<%?(B(bach)$B$^$G$G$H(B
$B!!$^$C$F$$$k$h$&$J$N$G$9$,!%!%!%%"%I%P%$%9$*4j$$$7$^$9!#(B

11/14/99
$B9uDE4pLo(B
---------$B!!(B

TROUBLE: Telnet/ftp via router fails.

 (kame) 1     2  (v4) 1     2  (v4)
+-------+     +-------+     +--------+
|poulenc|=====| bach  |=====| mozart |
+-------+     +-------+     +--------+
      192.168.4/24  192.168.3/24

OS (all machines) : FreeBSD 3.2-RELEASE
kame (poulenc)    : kame-19991012-freebsd32-stable

------
mozart% telnet poulenc
Trying 192.168.4.1...
telnet: Unable to connect remote host: Operation timed out 
------
poulenc# tcpdump -n -i ed0
01:17:32.817773 192.168.3.2.1111 > 192.168.4.1.23: S
3966415506:3966415506(0) win 16384 <mss 1460,nop,wscale
0,nop,nop,timestamp[|tcp]> (DF) [tos 0x10]
01:17:32.818293 192.168.4.1.23 > 192.168.3.2.1111: S
1126087372:1126087372(0) ack 3966415507 win 17520 <mss 1460> (DF) [ttl
0]
01:17:32.818767 192.168.4.2 > 192.168.4.1: icmp: time exceeded
in-transit (DF)
01:17:35.320159 192.168.3.2.1111 > 192.168.4.1.23: S
3966415506:3966415506(0) win 16384 <mss 1460,nop,wscale
0,nop,nop,timestamp[|tcp]> (DF) [tos 0x10]
01:17:35.320470 192.168.4.1.23 > 192.168.3.2.1111: . ack 1 win 17520
(DF) [ttl 0]
01:17:35.320950 192.168.4.2 > 192.168.4.1: icmp: time exceeded
in-transit (DF)
01:17:35.463082 192.168.4.1.23 > 192.168.3.2.1111: S
1126087372:1126087372(0) ack 3966415507 win 17520 <mss 1460> (DF) [ttl
0]
01:17:35.463561 192.168.4.2 > 192.168.4.1: icmp: time exceeded
in-transit (DF)
------
poulenc# ps ax
  PID  TT  STAT      TIME COMMAND
    0  ??  DLs    0:00.01  (swapper)
    1  ??  Is     0:00.03 /sbin/init --
    2  ??  DL     0:00.17  (pagedaemon)
    3  ??  DL     0:00.00  (vmdaemon)
    4  ??  DL     0:00.35  (syncer)
   35  ??  Is     0:00.00 adjkerntz -i
  101  ??  Is     0:00.21 syslogd
  106  ??  Is     0:01.32 named
  112  ??  Is     0:00.00 /usr/sbin/portmap
  125  ??  I      0:00.00 nfsiod -n 4
  126  ??  I      0:00.00 nfsiod -n 4
  127  ??  I      0:00.00 nfsiod -n 4
  128  ??  I      0:00.00 nfsiod -n 4
  153  ??  Ss     0:00.16 cron
  157  ??  Is     0:00.11 sendmail: accepting connections on port 25
(sendmail)
  244  ??  Ss     0:00.38 /usr/local/v6/sbin/route6d
  247  ??  Is     0:00.02 /usr/local/v6/sbin/rtadvd ed0
  251  ??  Is     0:00.10 /usr/local/v6/sbin/inet46d
  258  ??  Ss     0:01.89 telnetd
  371  ??  Is     0:00.09 telnetd
  259  p0  Ss     0:00.53 -tcsh (tcsh)
  415  p0  R+     0:00.00 ps -ax
  372  p1  Is     0:00.25 -tcsh (tcsh)
  376  p1  I+     0:00.03 more
  255  v0  Is+    0:00.03 /usr/libexec/getty Pc ttyv0
  256  v1  Is+    0:00.03 /usr/libexec/getty Pc ttyv1
  257  v2  Is+    0:00.03 /usr/libexec/getty Pc ttyv2
-------
poulenc% /usr/local/v6/bin/netstat
Routing tables

Internet:
Destination                   Gateway                   Flags      Netif
Expire
default                       192.168.4.2               UGSc        ed0
127.0.0.1                     127.0.0.1                 UH          lo0
192.168.4                     link#1                    UC          ed0
=>
192.168.4.2                   0:40:95:4f:0:c            UHLW       
ed0    286

Internet6:
Destination                   Gateway                   Flags      Netif
Expire
::1                           ::1                       UH          lo0
3ffe:505:962:1::/64           link#1                    UC          ed0
3ffe:505:962:1:240:95ff:fe4f:14 0:40:95:4f:0:14           UHLW       
lo0
3ffe:505:962:2::/64           fe80:4::240:95ff:fe4f:17  UGc        gif0
fe80:1::/64                   link#1                    UC          ed0
fe80:4::/64                   fe80:4::240:95ff:fe4f:14  Uc         gif0
fe80:4::240:95ff:fe4f:14      ::1                       UH          lo0
fe80:5::/64                   fe80:5::240:95ff:fe4f:14  Uc         gif1
fe80:5::240:95ff:fe4f:14      ::1                       UH          lo0
fe80:6::/64                   fe80:6::240:95ff:fe4f:14  Uc         gif2
fe80:6::240:95ff:fe4f:14      ::1                       UH          lo0
fe80:7::/64                   fe80:7::240:95ff:fe4f:14  Uc         gif3
fe80:7::240:95ff:fe4f:14      ::1                       UH          lo0
fe80:a::/64                   fe80:a::1                 Uc          lo0
ff01::/32                     ::1                       U           lo0
ff02:1::/32                   link#1                    UC          ed0
ff02:4::/32                   fe80:4::240:95ff:fe4f:14  UC         gif0
ff02:5::/32                   fe80:5::240:95ff:fe4f:14  UC         gif1
ff02:6::/32                   fe80:6::240:95ff:fe4f:14  UC         gif2
ff02:7::/32                   fe80:7::240:95ff:fe4f:14  UC         gif3
ff02:a::/32                   fe80:a::1                 UC          lo0
