Date: Mon, 20 Aug 2007 11:21:28 -0400 From: Anish Mistry <mistry.7@osu.edu> To: David Malone <dwmalone@maths.tcd.ie> Cc: freebsd-current@freebsd.org Subject: Re: Can't create TCP connections to certain IP addresses Message-ID: <200708201121.37098.mistry.7@osu.edu> In-Reply-To: <20070820084759.GA65560@walton.maths.tcd.ie> References: <200708191147.10340.amistry@am-productions.biz> <200708191751.23094.amistry@am-productions.biz> <20070820084759.GA65560@walton.maths.tcd.ie>
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--nextPart1889172.9WWZj0gFI5 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 20 August 2007, David Malone wrote: > 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. There doesn't seem to be checksum offloading on the sender ath0 sender: tcpdump -s0 -v=20 http://am-productions.biz/debug/littleguy.tcpdump.txt =46ar end: tcpdump -s0 -v host 192.168.1.188 http://am-productions.biz/debug/bigguy.tcpdump.txt =2D-=20 Anish Mistry --nextPart1889172.9WWZj0gFI5 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBGybGBxqA5ziudZT0RAhEUAJ9WbjV7dIVjvxp0/2Cf44QOf/unhgCfbvSd LDxXrdgjc5tjYiXMF2+GK/8= =NomB -----END PGP SIGNATURE----- --nextPart1889172.9WWZj0gFI5--
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