Hello everyone, So, I've used the predefined protocol definitions to block MSN messenger, but my clients still get through. I create packet filters to block the ports that messenger uses and my clients still get through. I check the messenger connection status and it says that it is using HTTP to communicate. My clients can even transfer files via HTTP with messenger. If anyone knows how to block this, please let me know. Carson Reid, MCSE,MCSA,A+ Network Administrator Herzing College Winnipeg Campus LEARN.EARN.WIN. PHONE: 204.775.8175 FAX: 204.783.8107 Creid@xxxxxxxxxxxxxxx