Hi, guys i was trying to use Yaho messenger web cam behind isa but i get a messege stating that i can`t due to firewall i got the following RESPONSE from yahoo support ************** There are a few reasons you might receive this error message. Please make sure you are using the "No Proxies" connection setting. To select this setting: 1. Click on the "Login" menu in the Yahoo! Messenger window and select "Preferences." 2. Select the "Connection" category. 3. Enable the "No Proxies" option. 4. Click the "OK" button at the bottom of the window. 5. Close Messenger completely and start the program again. This should eliminate the error message. Please Note: If you are unable to connect using the "No Proxies" option, please reverse your changes. Are you behind a firewall? Your firewall must permit outgoing TCP connections on port 5100. Please make the following changes to your firewall : Protocol: TCP Server: webcam.yahoo.com Port: 5100 Most Internet service providers (ISPs) don't have firewalls or proxies, but you should contact your network administrator or ISP for accurate information. Windows XP: You may be running XP's built-in Internet Connection Firewall (ICF) without your knowledge. Please visit the following URL MY QUESTON IS HOW CAN I CREAT THESE PORTS IN ISA & IN WIN 2003 SERVER ? PLEASE SOME ONE HELP !