View Full Version : Can't open specific ports on my Mac

Demigod Mac
Dec 15, 2010, 05:55 PM
Trying to open ports to allow hosting Killing Floor games, but no matter what I do, it doesn't want to open them.

The following ports are used by the game:
7707 UDP/IP (Game Port)
7708 UDP/IP (Query Port)
7717 UDP/IP (GameSpy Query Port)
28852 TCP/IP and UDP (Allows your Server to Connect to the Master Server Browser)
8075 TCP/IP (Port set via ListenPort that your WebAdmin will run on)
20560 UDP/IP (Steam Port)

* Linksys E1000 router w/ latest firmware installed
* Computer is assigned a static IP address (wired connection)
* Port Forwarding and Port Range forwarding have been configured
* Have tried DMZ to my Mac, no difference
* Mac OS X Firewall is disabled
* Router firewall is disabled
* Firewall On with the app on the allow list isn't making a difference

This web-based tool and Network Utility keep showing the required ports as "closed" even though I have set up port forwarding to my Mac's IP and there are no firewalls in place.

Here's the thing: if I enable something like Web Sharing (port 80) in Sharing, it opens and closes the port just fine, and those two utilities show the port's status properly.

But no matter what I do, firewall on or off, I can't get ports 7707-7717 and the others to become "open" on my Mac.

Demigod Mac
Dec 15, 2010, 06:26 PM
Follow up:

I think I narrowed this down to the router.

Plugging the modem into the computer directly- it works! Friends can join my game without an issue.

Puzzling, to say the least.

Les Kern
Dec 15, 2010, 06:49 PM
try enabling the firewall and opening the ports manually? Just something to try.