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Date:      Tue, 19 Apr 2005 08:23:54 +0700 (ICT)
From:      Olivier Nicole <on@cs.ait.ac.th>
To:        jpp@cloudview.com
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Multicast and security
Message-ID:  <200504190123.j3J1Nsxj032851@banyan.cs.ait.ac.th>
In-Reply-To: <42643F94.7020903@cloudview.com> (message from John Pettitt on Mon, 18 Apr 2005 16:15:32 -0700)
References:  <42643F94.7020903@cloudview.com>

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> I'm looking at adding MROUTING to my gateway/firewall box (Soekris
> 4801 running 5.4 RC2).  However having not played with multicast
> before I'm looking for pointers on the security issues (I don't want
> to create a gaping hole in my FW).

It depends on how your ISP is doing his multicast routing. Here we are
using PIM and it means:

PIM proto 103 from router to router and from router to 224.0.0.13/32

IGMP proto 2 from client to 224/4

UDP from client to 224/4

Olivier



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