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(UPDATE: This issue has been worked around / resolved. Please see Xbox Live Open NAT Using pf on OpenBSD.)
I rather enjoy turn-based artillery games like Worms, Scorched Earth (and Scorch 2000 and Scorched 3D), and GORILLA.BAS, so when I found out that Worms for Xbox Live Arcade was available, I purchased it.
A few months ago, before Microsoft released NXE, or the New Xbox Experience, I had no problems playing Worms online when using my Trashwall set up with the Microsoft proscribed forwards of 88/udp, 3074/udp, and 3074/tcp. However, after NXE was released it seemed to stop working. The Xbox LIVE test would consistently tell me that I have “Strict” NAT settings and that some things won’t work. I was unable to host private or public games. Xbox LIVE supposedly works best with either a direct internet connection or a firewall which implements UPnP, so I set to implementing UPnP on my pf-based firewall.
In order to do so I compiled and set up miniupnpd per the directions, but I ran into a whole bunch of weirdness along the way. I eventually got it working, getting an occasional successful Xbox LIVE test (as seen above) which indicates “Open” NAT, and I was able to play a private game against
Below the cut I’ll document what I’m been seeing.
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