RELENG-7 tcp connectivity problems with certain clients

[Mike Silbersack]

On Fri, 7 Mar 2008, Jake Rizzo wrote:

> Hi,
>
> I had two 6.3-STABLE boxen which have been happily running away for months
> on end now without any problems. Last week I upgraded  (via buildworld) both
> boxes to 7.0-STABLE.  Since then I've had reports of some clients being
> unable to connect via tcp.  I've seen this happen first hand on an affected
> remote machine. Traceroute & ping gets to the machine just fine
> but connecting to an open tcp port on the machine just times out.  The
> remote box was a XP machine and so I didn't have the luxury of tcp dump on
> that end, however I did get a chance to run it at the freebsd end:

Try this change; it was too late to be put in 7.0, but it will be merged 
to 7-stable in a few days:

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/tcp_var.h.diff?r1=1.160;r2=1.161

-Mike