[afnog] mail problem

[Mike Barnard]

Hi, ...Brian, couldnt get to anyone on the italy side to run a similar
process and get back to me with the results, but this is what i have on my
side

mail# tcpdump -i rl0 -n -s1500 -v host 81.208.64.123
tcpdump: listening on rl0
10:55:19.096574 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460,nop,wscale 0,nop,nop,timestamp
101344 0> (DF) [tos 0x10]  (ttl 64, id 48385, len 60)
10:55:22.095482 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460,nop,wscale 0,nop,nop,timestamp
101644 0> (DF) [tos 0x10]  (ttl 64, id 48638, len 60)
10:55:25.295524 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460,nop,wscale 0,nop,nop,timestamp
101964 0> (DF) [tos 0x10]  (ttl 64, id 48841, len 60)
10:55:28.495615 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460> (DF) [tos 0x10]  (ttl 64, id
49275, len 44)
10:55:31.695636 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460> (DF) [tos 0x10]  (ttl 64, id
49475, len 44)
10:55:34.895667 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460> (DF) [tos 0x10]  (ttl 64, id
49586, len 44)
10:55:41.095760 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460> (DF) [tos 0x10]  (ttl 64, id
49941, len 44)
10:55:53.295948 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460> (DF) [tos 0x10]  (ttl 64, id
50773, len 44)
10:56:17.496350 41.220.14.11.3744 > 81.208.64.123.110: S [tcp sum ok]
666965989:666965989(0) win 65535 <mss 1460> (DF) [tos 0x10]  (ttl 64, id
52025, len 44)

for sure the packets are not reaching his mail server at
all....tcptraceroute, tracepath, traceroute all end dead at the same point.

im not quite the guru on networks, so some one educate me here. Richard and
i are on the same backbone, different blocks of ip addresses. i use a /23 on
41.220.14.0 and i believe he is on the 217.212.242.0 blocks. a traceroute
from both networks takes different paths yet we all exit through the same
gateway router. he can reach and i cannot. i noticed that at some point the
paths we both take differ...


my route path
>   2 213.248.97.89 <http://213.248.97.89> 552 msec 544 msec 540 msec
>   3 213.248.65.9 <http://213.248.65.9> 544 msec 548 msec 544 msec
>   4 213.248.65.146 <http://213.248.65.146> 560 msec 580 msec 556 msec
>   5 213.248.64.42 <http://213.248.64.42> 552 msec 556 msec 556 msec
>   6 213.248.65.230 <http://213.248.65.230> 568 msec 580 msec 568 msec
>   7 213.248.103.230 <http://213.248.103.230> 568 msec 576 msec 576 msec
>   8 213.140.31.150 <http://213.140.31.150> 572 msec 568 msec 572 msec
>   9 62.101.93.10 <http://62.101.93.10> 640 msec 588 msec 672 msec
>  10  *  *  *

Richards path
1 kbn-b1-link.telia.net (213.248.97.89) 4 msec 4 msec 8 msec
 2 kbn-bb1-pos1-0-0.telia.net (213.248.65.9) [AS 1299] 8 msec 4 msec 4 msec
 3 hbg-bb1-pos7-0-0.telia.net (213.248.65.146) [AS 1299] 16 msec 12 msec 12
msec
 4 ffm-bb1-pos7-0-0.telia.net (213.248.64.42) [AS 1299] 24 msec 24 msec 24
msec
 5 mno-b1-link.telia.net (213.248.65.230) [AS 1299] 36 msec 36 msec 40 msec
 6 fastweb-01691-mno-vcn-i1.c.telia.net (213.248.103.230) [AS 1299] 36 msec
40 msec 36 msec
 7 81-208-50-42.ip.fastwebnet.it (81.208.50.42) [AS 12874] 40 msec 36 msec
40 msec
 8 62-101-93-6.ip.fastwebnet.it (62.101.93.6) [AS 12874] 36 msec 40 msec 36
msec
 9  *  *  *

could this be the problem?

Thanks again for the help
Mike
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