[KLUG Members] Linux, iptables, kernel 2.6.6, nat, and H.323

[Todd Pillars]

On Fri, 2004-08-13 at 03:15, Adam Bultman wrote:
> Greetings, everyone...
> 
> So, at this point, I'm using iptables and NAT to try to get my IP phone 
> to work, a polycom.
> 
> So far, I can get phone calls to work, sort of .   Incoming calls come 
> in, and outgoing calls go out, except that the person on the 'other end' 
> can't talk to me - I can only talk to them.
Your RTP Stream is being blocked. You need to set up forwarding on a
port > 1024 to your box (or phone) that is NAT'ed (and that port should
match the incoming RTP port of the phone.

Here is a link to a gnomemeeting H.323 iptables setup (and H.323
gateway)
http://www.gnomemeeting.org/index.php?rub=3&pos=0&faqpage=x266.html

Here is a link to common H.323 ports
http://www.teamsolutions.co.uk/tsfirewall.html

Hope this helps
Todd