Make sure you only have TCP/IP enabled on the external interface. (Take the check out of all the other checkboxes). If you want to see what ports your server is listening to, go to a command prompt and type: netstat -a. J. Ryan Porter, MCT, MCSE ________________________________ From: Abdalla Ziraba [mailto:abdalla@xxxxxxxxxxxxx] Sent: Saturday, September 06, 2003 4:04 AM To: Subject: Restricting ports Hi all, I have a W2Ksp4 server box running EX2ksp3 and ISA server. I'm worried it might still be open. I want to use only the required ports and protocols for exchange, msn messenger and be able to download using flashget, download accelerators. Anybody know the exact ports and protocols I require? Thanks in advance