Date: Wed, 30 May 2007 12:35:23 -0700 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Andre Oppermann <andre@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Segment failed SYNCOOKIE? Message-ID: <20070530193523.GA13655@troutmask.apl.washington.edu> In-Reply-To: <465D70A4.3040107@freebsd.org> References: <20070525234115.GA48789@troutmask.apl.washington.edu> <465AF5C6.2010302@freebsd.org> <20070529002304.GA90534@troutmask.apl.washington.edu> <465D70A4.3040107@freebsd.org>
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On Wed, May 30, 2007 at 02:40:04PM +0200, Andre Oppermann wrote: > > I have committed further changes and logging to tcp_input() that > will give more insight into this. Please update to the latest > current and report the new log messages. > Andre, I have src/sys/netinet/tcp_syncache.c,v 1.120 2007/05/28 23:27:44 andre Exp $ which is giving me May 30 12:20:07 node13 kernel: bge0: watchdog timeout -- resetting May 30 12:20:07 node13 kernel: bge0: link state changed to DOWN May 30 12:20:09 node13 kernel: bge0: link state changed to UP May 30 12:20:53 node13 kernel: TCP: [192.168.0.13]:55626 to [192.168.0.13]:59148 tcpflags 0x10<ACK>; syncache_expand: Segment failed SYNCOOKIE authentication, segment rejected (probably spoofed) May 30 12:20:53 node13 kernel: TCP: [192.168.0.11]:62391 to [192.168.0.13]:50827 tcpflags 0x11<FIN,ACK>; syncache_expand: Segment failed SYNCOOKIE authentication, segment rejected (probably spoofed) May 30 12:20:54 node13 kernel: TCP: [192.168.0.12]:63318 to [192.168.0.13]:55624 tcpflags 0x10<ACK>; syncache_expand: Segment failed SYNCOOKIE authentication, segment rejected (probably spoofed) I don't know if the watchdog timeout is a symptom or cause of the SYNCOOKIE problem. Note, this is an openmpi app that is using the Message Passing Interface to communicate between processes. -- Steve
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