Can't host IPv4 game with lobby server

[parker]

When trying to host a game I get the error:
"Error while connecting to the lobby server: Connection timed out
Make sure port 2100 can receive incoming connections."
Port 2100 is forwarded from my router to my computer (ubuntu 10.10).

I get this with the current stable version 2.3.7 and Master-20110127. netstat -nl gives a clue:
tcp6 0 0 :::2100 :::* LISTEN

That output means it's listening on port 2100 for IPv6 only. There is no corrosponding line for tcp (IPv4). I have IPv6 support on (default in ubuntu) but my ISP only gives me an ipv4 address. I don't know much about IPv6, I'm not intentionally using it, and I'm not sure why warzone will only listen on IPv6. How do I force it to use IPv4 when hosting a server with the lobby?

Checking for open ports using http://www.yougetsignal.com/tools/open-ports/ shows that port 2100 is closed. I'm assuming it's because warzone is not using my IPv4 address.

[Fastdeath]

Hi Parker,

The OS does map from IPv6 to IPv4 Warzone doesn't need to listen IPv4 and IPv6.

Please check your router, firewall and portforwarding.

Regards,
Fastdeath

[parker]

Fixed. It didn't have anything to do with IPv6 (or 4). I double checked my router, forwarded ports, and firewall. It turned out to be a missing comma in /etc/firestarter/inbound/allow-service firewall rules for firestarter on the local machine. I had edited it by hand remotely over ssh where I didn't have the firestarter GUI available.

Thanks for your help.