multiplayer server

i want a way to make my server multiplayer without turning my firewall off :P
someone mentioned hosting from there computer?
if it helps im using club559's source

You'll have to turn the firewall off, Or configure it to not block the server, which is nearly definitely possible with Advanced firewall settings, or some shit like that.
I don't know any way of doing it without taking your firewall down, ofcourse, except for having a company host it for you, Which probably nobody would do, because #getsued, etc..

Well actually just get a vps or if running off a computer, port forward