[Shorewall-newbies] H323 and videoconferencing

Alex Martin shorewall at rettc.com
Sun Dec 7 16:18:09 PST 2003


I searched at www.shorewall.net for netmeeting:
Found FAQ #3:

3. I want to use Netmeeting or MSN Instant Messenger with Shorewall. 
What do I do?

Answer: There is an H.323 connection tracking/NAT module ( H.323 
connection tracking/NAT module) that helps with Netmeeting. Look here 
(http://linux-igd.sourceforge.net/) for a solution for MSN IM but be 
aware that there are significant security risks involved with this 
solution. Also check the Netfilter mailing list archives at 

Does this help? I am not familiar with h323. But I am happy to help you 
work through it. Apparently, there are many different applications that 
use variants of the definition.

Alex Martin

gregory wrote:

> I know this topic has been tackled before. I've searched the 
> mailinglist. But I can't figure it out.
> Can someone give me the rule set to allow h323 connections from and to 
> another computer? I don't really care, I know I'll be punching huge 
> holes in my firewall.
> Right now I have this in my rules file:
> ACCEPT  loc     fw      tcp     7122
> ACCEPT  net     loc     tcp     1720
> ACCEPT  loc     net     tcp     1720
> ACCEPT  loc     net     tcp     30000:30010
> ACCEPT  loc     net     udp     5000:5003
> ACCEPT  loc     net     udp     5010:5013
> ACCEPT  net     loc     tcp     389
> ACCEPT  net     loc     tcp     522
> ACCEPT  net     loc     tcp     1503
> ACCEPT  net     loc     tcp     1731
> ACCEPT  net     loc     tcp     1024:65535
> ACCEPT  loc     net     tcp     1024:65535
> ACCEPT  net     loc     udp     1024:65535
> ACCEPT  loc     net     udp     1024:65535
> But it still doesn't work. I'm using Gnomemeeting or Netmeeting, 
> depends, I dual boot. The other party is always using Netmeeting.
> Gregory
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