I have exactly same problem and it seems that lot of people does too.
The problem started about month ago. First I played XBC with no problems about a year. Then I installed X-link and everything was fine. Suddenly when I started to play RS3 the problem occurred. First everything was fine, exept that almost everytime (i played with my friend) mine or my friends connection was lost when loading a game, but one xbox-reboot and everything was fine. But one time in the same situation my whole internet connection froze and i had to reboot computer. After that it was same thing everytime, no matter if it was XBC or X-link. When I started XBC or X-link, the connection lasted about a minute and then the internet connection was lost and there was nothing to do exept reboot computer. I tried to install WinPCap 3.01 Alpha but it didn't helped. I tried different kind of settings but with no luck. Everytime that one minute or so and thats it. So i re-installed my windows xp.
After that I decided install only XBC for start and test with it. Everything worked properly and I played RS3 with my friend about 10 times and he hosted everytime. Today I decided to host and when i loaded the game, my internet connection failed. So we tried that he hosts but with no luck. Now I have the same problem all over again. Does anyone have any ideas because what I have read, quite many have the same problem and it is really annoying because it freezes the whole netgaming

I have now XBC and WinPcap 3.0 installed. So its the same problem everytime, no matter what tunneling program, after about one minute the internet connection is lost.
Oh yes and my net setting is two NICs and crossover cable. I hope someone can atleast try to solve this problem with me and the others. I can give more details if needed.
EDIT: Example
here guy seems to have a same problem.
This post has been edited by Flappis: Jan 24 2004, 08:56 AM