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Date: Sat, 14 Mar 2009 17:03:54 +0300
From: Sergey Matveychuk <sem@FreeBSD.org>
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To: Dmitriy Demidov <dima_bsd@inbox.lv>
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Cc: freebsd-ipfw@freebsd.org
Subject: Re: keep-state rules inadequately handles big UDP packets or
 fragmented IP packets?
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Dmitriy Demidov wrote:
> Unbound starts working only then I put in ipfw this set of rules to handle all UDP packets outside from keep-state rules:
> add allow udp from any to any

What if you add:

add allow ip from any to any frag

instead the line above?

> add check-state
> add deny icmp from any to any frag

I'm not sure the line above is correct.

> add allow icmp from any to me icmptypes 0,3,11
> add allow icmp from me to any out keep-state
> add allow tcp from me to any out keep-state
> add allow udp from me to any out keep-state
> add deny ip from any to any
> 
> It looks like dynamicaly created rules some how inadequately handles big UDP packets (DNSSEC answers are big).
> Is there any who can help to investigate this issue (looks like I can't do it myself)?
> Can it be ipfw related issue?

-- 
Dixi.
Sem.