[plug] help with SIP/RTP protocol

[W.Kenworthy]

Can of worms!  Is it RTP audio streaming, VoIP, ...

Both can be 'difficult' if RTP is dynamically allocating ports.

BillK


On Sat, 2006-04-01 at 11:22 +0800, Jon Miller wrote:
> I need to get RTP to go both ways thru our firewall (Debian 3.1 iptables).
> I have constructed the following, but it is not working.
> I can see the packets coming from the workstation on the LAN, but I cannot see RTP between the firewall and the router.  I'm sure the firewall is restricting or filtering this out.
> I've constructed the OUTPUT rule to be something like 
> $IPT -A OUTPUT -i $INT_IFACE -p udp --sport 49152:65535 -j ACCEPT$IPT -A OUTPUT -i $INT_IFACE -p udp --sport 7824 -j ACCEPT
> 
> The INPUT rule is something like:
> $IPT -A INPUT -i $EXT_IFACE -p udp --sport 49152:65535 -j ACCEPT
> $IPT -A INPUT -i $EXT_IFACE -p udp --sport 7824 -j ACCEPT
> 
> Does this look right?
> 
> 
> Thanks
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