* syn connection not replied with ack
@ 2012-08-28 17:03 mpe
0 siblings, 0 replies; only message in thread
From: mpe @ 2012-08-28 17:03 UTC (permalink / raw)
To: netdev
Hi all,
I have very very strange behaviour with a virtual machine (centos 6
up-to-date).
Then I try to connect to it with a linux ssh client, I see the syn, but
not the syn-ack replied. On the same target when I connect with windows
machine, it reply correctly and the communication starts.
tshark show me with linux:
386.134073 172.18.0.160 -> 172.18.0.254 TCP 45092 > ssh [SYN] Seq=0
Win=4240 Len=0 MSS=1060 TSV=497047 TSER=0 WS=5
389.134556 172.18.0.160 -> 172.18.0.254 TCP 45092 > ssh [SYN] Seq=0
Win=4240 Len=0 MSS=1060 TSV=497798 TSER=0 WS=5
395.134926 172.18.0.160 -> 172.18.0.254 TCP 45092 > ssh [SYN] Seq=0
Win=4240 Len=0 MSS=1060 TSV=499298 TSER=0 WS=5
and windows:
1099.091686 172.18.0.141 -> 172.18.0.254 TCP 32906 > ssh [SYN] Seq=0
Win=8192 Len=0 MSS=1260 WS=8
1099.092934 172.18.0.254 -> 172.18.0.141 TCP ssh > 32906 [SYN, ACK]
Seq=0 Ack=1 Win=5840 Len=0 MSS=1380
1099.092960 172.18.0.141 -> 172.18.0.254 TCP 32906 > ssh [ACK] Seq=1
Ack=1 Win=65520 Len=0
1099.102017 172.18.0.254 -> 172.18.0.141 SSH Server Protocol:
SSH-2.0-OpenSSH_4.3
iptables are disabled, no modules active (lsmod | grep ip show nothing)
I tried also to remove the vmware vmxnet3 module, reloaded, network
restart, but the same.
But... if I reboot, the communication start for the next 2/3 days and
after it stops another time.
Hope that someone can help me.
Michele
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2012-08-28 17:03 syn connection not replied with ack mpe
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