From owner-freebsd-current@FreeBSD.ORG Thu Jun 28 15:13:05 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id BB9A516A46C for ; Thu, 28 Jun 2007 15:13:05 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.208.78.105]) by mx1.freebsd.org (Postfix) with ESMTP id 9EB0C13C4B7 for ; Thu, 28 Jun 2007 15:13:05 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu [127.0.0.1]) by troutmask.apl.washington.edu (8.14.1/8.13.8) with ESMTP id l5SFCOQw058232; Thu, 28 Jun 2007 08:12:24 -0700 (PDT) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.14.1/8.13.8/Submit) id l5SFCFkL058231; Thu, 28 Jun 2007 08:12:15 -0700 (PDT) (envelope-from sgk) Date: Thu, 28 Jun 2007 08:12:15 -0700 From: Steve Kargl To: Eygene Ryabinkin Message-ID: <20070628151215.GA58165@troutmask.apl.washington.edu> References: <20070628014311.GA50012@troutmask.apl.washington.edu> <20070628105039.GE11335@void.codelabs.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070628105039.GE11335@void.codelabs.ru> User-Agent: Mutt/1.4.2.2i Cc: freebsd-current@freebsd.org Subject: Re: SYNCOOKIE authentication problems X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Jun 2007 15:13:05 -0000 On Thu, Jun 28, 2007 at 02:50:40PM +0400, Eygene Ryabinkin wrote: > Steve, good day. > > Wed, Jun 27, 2007 at 06:43:11PM -0700, Steve Kargl wrote: > > Any advice on how to isolate or avoid? > > > > Jun 27 18:31:19 node11 kernel: TCP: [192.168.0.11]:59661 to > > [192.168.0.11]:63266 tcpflags 0x10; syncache_expand: Segment failed > > SYNCOOKIE authentication, segment rejected (probably spoofed) > > According to Andre Oppermann, these are harmless: > http://lists.freebsd.org/pipermail/freebsd-net/2007-June/014401.html > > But I am expiriencing some problems related to the other messages > like 'tcp_input: Listen socket: Spurious RST, segment rejected'. > Though it seems not to be your case, but my problems are documented > in the aforementioned thread. Just in case you're curious... > -- Andre certainly knows more about TCP/IP than I, but no, these are not harmless. Everytime one of these messages appears on the console, my MPI application hangs and must be restarted. My large numerical simulations randomly die anywhere from 15 minutes to 25 hours after launching the job. -- Steve