Derunzz

Hello guys. For quite a while, I've been trying to play with my friends on their server, but this is an unofficial one and I also think my problem is coming from this. Everytime I try to connect to my friend his server, it says Connecting Failed, but when I try to join a official server, it just connects without any problems, and I've been looking around Google for problem fixes already such as opening your ports, which I did, but not sure if I did it right. 2302, UDP, 2302. 2303, UDP, 2303. 2305, UDP, 2305. I have a Belkin router, and I've also seen that I need to disable my SPI somewhere in my WAN setup, which I cannot find ( Perhaps this will solve problem, if anyone can describe me how I can disable my SPI with a Belkin, please say it. ) If there is any ports which need to be opened more, then you can say it, in my Firewall, I allowed every single ArmA 2: Operation Arrowhead and ArmA 2 on public and home/work, can someone please help me? I'd be thankfull forever :). Sincerely, Derunzz.

Okay then, but how can I fix this problem?