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 From:  "Chris Buechler" <cbuechler at gmail dot com>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Problem with MTU
 Date:  Fri, 7 Jul 2006 15:34:05 -0400
On 7/7/06, Andreas Ferrari <aferrari at stasoft dot ch> wrote:
> > How did you "set it by hand"?
> ifconfig interface mtu size -> (on https://mym0n0.foo/exec.php)

That will only affect traffic originated by m0n0wall.  You need to use
the setting on the WAN page for other hosts, so MSS clamping will

> I had to set it because a postfix server behind the m0n0wall still gets
> a lot of timeouts.
> The mss clamping feature didnt solve my problem..
> Only setting it hard with ifconfig (see above) solved the problem...

That really shouldn't have any effect.  Are you sure this is really
what resolved it and wasn't just a coincidence?