Well, i'm using Mac OS 9.2, without any kind of software firewall.

So the problem isn't firewalls & easily opened closed ports, the real problem i realize now, and didn't empazise enough in my first post is Private IP's (10.n.n.n , 172.16.n.n , 192.168.n.n). two computers with Private IP's can absolutely not communicate, what worse is P-ip disables certain kind of chat & games. because of my stupid private ip i can't run a hotline/carracho server despite i've opened up all required ports.

Still, as i mentioned earlier most broadband ISP's uses private IP's for their customers (adsl/cable tv-internet not counted as broadband)

This means that those with high bandwith cannot download from eachother, only from "slower" sources. And eventually the majority will have Private-ip's, probably at the same time as gnutella network becomes popular...




btw, is there any program/webbsite that can check which ports i have open??