Hey everyone, I'm new here so I hope I'm not breaking any of the rules (I did read them) but here's my problem:

I'm running a PC server (1.5.2) and have all of my port-forwarding and firewall settings setup to allow access as per various tutorials. When my Mac using roommate tries to connect to my server, he gets a connection refused message. However, when I have PC/Linux using friends try to connect over the internet, it works fine. I think that it's probably one of two things:

1) There's some sort of Mac compatability issue that I'm not aware of  (not being a Mac user myself)

or

2) Since we're both using the same local router/modem that there's some kind of internal network conflict which prohibits normal online connection.

Also, I'm positive that he's running 1.5.2, so it's not a version issue.

I'd appreciate any help this community could provide. Thanks!