Re: cu-seeme behind firewall

Kevin McCormick (
Mon, 03 Aug 1998 16:00:43 -0400

Hi Rike,

Ports to open up in a firewall:

UDP Sockets:
7648 for video/audio
7649 Ref. to Ref. control
7649 Ref. to Ref. control

TCP Sockets:
7640 Reflector control via TELNET
7648 connection listener
7649 connection establishment

This info can be found at

Hope this helps.



At 11:50 AM 8/3/98 PDT, you wrote:
>excuse me, Im sure this has been asked before, but I dont have time
>right now to go through the archives since Im only a guest lecturer
>with limited access time here in Salzburg / Austria ...
>would anyone know the port number(s) to be assigned for cu in a firewall
>Have to demonstrate some public reflectors to students from behind a
>firewall, and the system administrator is willing to change it for me if
>I can tell him the numbers by tomorrow !
>Id really appreciate your help ...
>thanks !
>Rike Anders
>Get Your Private, Free Email at