Date: Mon, 20 Aug 2007 09:47:59 +0100 From: David Malone <dwmalone@maths.tcd.ie> To: Anish Mistry <amistry@am-productions.biz> Cc: freebsd-current@freebsd.org Subject: Re: Can't create TCP connections to certain IP addresses Message-ID: <20070820084759.GA65560@walton.maths.tcd.ie> In-Reply-To: <200708191751.23094.amistry@am-productions.biz> References: <200708191147.10340.amistry@am-productions.biz> <20070819191647.GA59444@walton.maths.tcd.ie> <200708191751.23094.amistry@am-productions.biz>
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On Sun, Aug 19, 2007 at 05:51:14PM -0400, Anish Mistry wrote: > I'm not sure how to do that with the version of m0nowall that the > router is running. But I can exhibit this behavior on the local LAN > without going through the router. In that case, run a tcpdump on both ends and see if the SYN packet is arriving at the far end. You might also want to try using "tcpdump -s0 -v" to check the checksums on the packets (though they can't always be trusted on the packet's sender if the network card supports checksum offloading). David.
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