After setting up ISA during SBS 2000 setup, only Browser connects to internet on external NIC. (Connected to LinkSys router). Can send email outbound. No other program connects to internet including Nav 7.6 Antivirus to do updates. When we reboot and use only the internal NIC now directly connected to Linksys, with default Gateway added and External NIC Disabled, everything works. ISA router is set with default filters. When we try ICW, it gets to ISA and then blue screens after about 3 minutes. Linksys Router Multihome (2) SBS2000 Internal address is 192.168.X.X External Address is 12.249.x.x Internal DNS forward zone: is company.com External DNS Forward zone: is www.company.com with external address Any Help would be appreciated. Elliott