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Date: Fri, 21 Sep 2007 21:03:41 +0200
From: Kris Kennaway <kris@FreeBSD.org>
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To: Petr Holub <hopet@ics.muni.cz>
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Cc: current@freebsd.org
Subject: Re: TCP socket problem on Sept. -CURRENT snapshot
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Petr Holub wrote:
> Hi,
> 
> I've encountered the following problem while building xorg from
> ports:
> 
> TCP: [134.76.12.3]:21 to [147.251.54.186]:56914 tcpflags 0x18<PUSH,ACK>; tcp_do_
> segment: FIN_WAIT_1: Received data after socket was closed, sending RST and remo
> ving tcpcb
> TCP: [134.76.12.3]:21 to [147.251.54.186]:62424 tcpflags 0x18<PUSH,ACK>; tcp_do_
> segment: FIN_WAIT_1: Received data after socket was closed, sending RST and remo
> ving tcpcb
> TCP: [134.76.12.3]:21 to [147.251.54.186]:55989 tcpflags 0x18<PUSH,ACK>; tcp_do_
> segment: FIN_WAIT_1: Received data after socket was closed, sending RST and remo
> ving tcpcb
> TCP: [134.76.12.3]:21 to [147.251.54.186]:52923 tcpflags 0x18<PUSH,ACK>; tcp_do_
> segment: FIN_WAIT_1: Received data after socket was closed, sending RST and remo
> ving tcpcb
> 
> It occurred from several different addresses and results in being
> unable event to ping that IP until reboot.

These log messages are informational, if you see ICMP problems it must 
have another source.

Kris