Testing ports on fire wall

[DrJones]

Right now i'm running mandrake 9.0. I have my cable modem comming into my linux box, and my windows box set up behind it on a local network. The net and everything works fine. The issue i have (i think) is with the fire wall. I'm using the wizzard to set it all up. For the most part it works fine. But when i try to do special stuff with it, sometimes it works sometimes it doesn't.

ie trying to host a custom game on battle net. No one can join my games, i'm assuming it's because of the firewall. (i can join other peoples games just fine). In the settings i have port 6112 chosen. In the firewall config under drakconf i added 6110/tcp 6110/udp .... 6120/tcp 6120/udp. It seem this would open the ports the game uses and let me host... but no go.

Is there a way to test (ie via external program) to actually make sure that i can send and receive packets through that port? This isn't the first time i opened a port which should of fixed my problem but didn't. Thanks for the help.

[bdw72]

If you know someone with a port scanner, you could use that to scan your internet ip addr and see what ports are showing open on the internet. I use nmap to scan my ip to check for open ports.

This will only tell you if the ports are open and not test the functionality of the ports.

Hope this helps