Server/Client timeout error

[zacory]

I'm trying to make a simple IM program. I created a server and client that connects specifically to my computer using Winsock2.h

I tested it and it works from my computer to my server, from my roommates computer to my server, the library computer to my server, but I had a friend in a different town test it and I keep getting 10061 timeout error.

I was thinking it was a firewall problem from my internet provide server, but I don't know, and I was hoping if someone could tell me what is preventing the connection, and if possible if I could get around it in my program or if I have to talk to a network technician to get it allowed.

thanks

[John A]

If you're sure that there's no firewalls interfering, then the ISP is blocking something. What port are you trying to run it on?

[zacory]

I'm using the 4000 port and also tried 4222.

[John A]

MSN works between you and your friend, right? Try running the program on port 1863 (I think...)

[zacory]

No, it still didn't work.

I'm more of wondering if there is something I should be, I don't know, "registring" to my isp's server telling it that I'm not a virus.