Your friend can't connect to games you host because you have either a firewall or router, or both, blocking incoming connections.

If you have a firewall, it needs to be configured to allow byond.exe, dreamseeker.exe, and dreamdaemon.exe full access to the Internet via the TCP protocol. If there is version checking in place, like something that talks about an MD5 hash to make sure the programs haven't changed, you need to uncheck that so that future updates won't cause any problems.

For your router, you need to go into your router's configuration (the manual should tell you, or you can search online) and set up port forwarding. Basically this is because when the router gets incoming traffic, it doesn't know which computer on your network it should send that traffic to. What you'll want to do is set up a specific port number or range to accept incoming TCP traffic. The port number should be high; I wouldn't go anywhere below 5000. You'll need at least one port forwarded for hosting games, and I recommend setting up another one for the pager. (You can go into File | Preferences in the pager to tell it which port to use.) Then whenever you host a game, use one of the ports you set up for forwarding instead of just 0, which tells BYOND to pick a port for you.

Lummox JR