From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Dykstra <john.dykstra1@gmail.com>
Subject: Re: TCP MD5 connections get stuck with IPV6 mapped listener
Date: Wed, 15 Jul 2009 14:43:05 -0500
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Cc: Adam Langley <agl@imperialviolet.org>, netdev@vger.kernel.org
To: Stephen Hemminger <shemminger@vyatta.com>
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On Wed, 2009-07-15 at 12:11 -0700, Stephen Hemminger wrote:
> While investigating some TCP MD5 issues, with BGP, broke things
> up into a simple test program found that
> if server is listening on IPV6 for TCP with MD5 key
> and client connects with IPV4 MD5 key, the connection gets stuck after
> the initial SYN-SENT, SYN-ACK.

Just cause I've been burned recently....

Which kernel did you reproduce this on, and have you tried 2.6.31-rcx?

  --  John