Hi,

I am behind an Apache proxy server. My problem is that Msn Messenger simply does not connect. I have entered the proper proxy settings. Yahoo Messenger works well, except for Voice chat and Web cam.

How do I get msn to work through the proxy. I do not need to use the advanced features, simple chat would be fine.

Alternatively, How can I use iptables to NAT only the messenger stuff and NOTHING else. I ask this because we use a user name based proxy, and I cannot allow pure NAT. Is there some Iptables rule which will allow me to NAT only the MSN ports and nothing else??

Thanks a lot

Aditya

check out the program reaim. it's on sourceforge.

MSN messenger uses port 1863. If you only want to allow MSN messenger traffic you should allow outgoing connection only to the port 1863 and allow incoming traffic only from port 1863 (on the outgoing Interface, the one that is connected to the Internet). First you should setup NAT, for that you can visit http://en.tldp.org/HOWTO/IP-Masquerade-HOWTO/

iptables -P FORWARD DROP
iptables -I FORWARD -p tcp --dport 1863 -j ACCEPT

The above two rules specify that your default forwarding policy is to drop the packets, however if the destination port is 1863 you allow it to pass through.