How can I tell if my ISP is blocking certain ports?

[Phoenix15]

I'm having wierd problems. Some of my games won't connect, Bittorrent won't work, etc.. I can browse the web fine though. Is there a program or something that can tell me if they block ports?

 

[sharkeeper]

Put your PC in the DMZ and use this.

 

[Reel]

You can call and ask. Check DSLReports forums for other people on that ISP. Many ISPs that I have used have blocked standard incoming ports.