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Date: Tue, 21 Aug 2007 16:31:26 +0200
From: Daniel Hartmeier <daniel@benzedrine.cx>
To: Jacek Zapala <jacek@ipv6.jacek.it.pl>
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Cc: freebsd-net@freebsd.org
Subject: Re: kern/115413: [ipv6] ipv6 pmtu not working
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On Tue, Aug 21, 2007 at 04:16:51PM +0200, Jacek Zapala wrote:

> I have disabled this on sending side (FreeBSD) and it started to work!

Ah, so it's related to window scaling. Headaches again ;)

Is the following a correct view of your setup:

  src ---- $int_if pf $ext_if ---- router ---- dst

Where client src connects to server dst, and you create the state entry
when the initial TCP SYN goes out $ext_if on the firewall?

The ICMPv6 is coming in on $ext_if, in the reverse direction, relative
to the initial TCP SYN?

And the router is between pf and dst, on the $ext_if side?

Daniel