Is it possible to host a warcraft custom game without a router what so ever?
I have a speed stream modem.
if its possible please tell me how

turn off your firewall

Its not working :/
i have vista and yea i turned it off

Vista is the problem, ask the people in computer hardware for help.

i can host..i can open you games if want..(only want a little bit fg..)

or i can say you how you can host = need fg

ripoff.

make sure you have updated vista to its current state, as people have issues trying to host games on outdated versions of Vista. you should use the open ports tool to make sure port 6112 is open. also try entering your modem's setup page, if you give me your modem info (Brand/Model) i can help you for free.