I have an issue with being the host of online gamesa. I never lag during a game hosted by others but I am never able to host a game. How do I fix this. (And is this topic in the right forum?)
None.
It may be an issue with your router, or firewall. I have the same problem.
Also,
no. 
Don't worry about it, though, a mod will move it.
Post has been edited 1 time(s), last time on Sep 7 2008, 12:21 am by FatalException.
None.

We can't explain the universe, just describe it; and we don't know whether our theories are true, we just know they're not wrong. >Harald Lesch
Usually you just need to open Port 6112 UDP.
But opening Port 53 (don't know if UDP or TCP, best try both) might help.
You have to do this for both your Router and your Software/Windows firewall.
Portforwarding 7777 TCP/UDP fixed it for me, dunno why.
None.
I have an issue with being the host of online gamesa. I never lag during a game hosted by others but I am never able to host a game. How do I fix this. (And is this topic in the right forum?)
Do you lag when mapmaking? If not, why did you post here?
None.