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Date: Tue, 28 Aug 2012 19:03:41 +0200 From: mpe <michele@...pex.it> To: netdev@...r.kernel.org Subject: syn connection not replied with ack 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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