Hi, I have a ISA2004 that recently 2-3 times daily it goes off line, users can not access the Internet. I either have to wait 3-5 minutes for the system to comes back up or go to the Microsoft Firewall services and Stop / Start it. Is there any reason for it. This has happened before but it correct itself. Now it is happening more often. I have all the updates for 2003 server and ISA installed. thanks