[MLUG] Netmeeting and firewall

[Mark Haidekker <EMAIL:PROTECTED>]

Hi,
here is a problem:

I have a firewall / NAT box running RH 6.2 (ipchains, not itables). This box 
is equipped with 2 ethernet cards, one (eth1) connected to a DSL modem, and 
the other one (eth0) to an internal 192.168 network. I use Bastille on that 
box. The high ports (1024-65535) are - with few exceptions - not blocked.

>From one of the internal boxes (windoze), I want to run Netmeeting. I can 
send video through the firewall, but not receive any video or audio. The 
other party sees the 192.168 box, though.

I have tried to add some rules to direct data from the other party (a dynamic 
IP on the 217.2.0.0 subnet) to my internal box at 192.168.1.5:

ipchains -I forward 1 -p tcp -s 217.2.0.0/16 1503 -d 192.168.1.5 1503 -b
ipchains -I forward 1 -p tcp -s 217.2.0.0/16 1720 -d 192.168.1.5 1720 -b
ipchains -I forward 1 -p tcp -s 217.2.0.0/16 1731 -d 192.168.1.5 1731 -b

This did not change anything though.

What am I doing wrong? Or did I understand the forward ruleset incorrectly?

Has anybody netmeeting running through a NAT firewall?

Thanks,
Mark
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