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From: Paolo Pisati <p.pisati@oltrelinux.com>
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To: "Mikhail T." <mi+thun@aldan.algebra.com>
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Cc: ipfw@FreeBSD.org, net@FreeBSD.org
Subject: Re: natd interferes with incoming RTSP/RTP
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Mikhail T. wrote:
> However, if I disable just one of the rules below -- 1300, the one
> diverting all traffic to natd -- the video works fine... So it is not
> any of the other rules, that are the problem, nor is it the remote
> server... Why would this happen and how do I solve the problem? Thanks!
>   
comment all the entries in /etc/libalias.conf, restart or send an HUP to 
natd and see if it helps.