I've asked this question before but it was under different circumstances so I need to try again for further clarification. This may seem like a "dumb question" but it's one I have to ask so please accept my apologizes in advance if anyone's bothered by it. I have the Configuring ISA 2004 book and I'm reading an article in Chapter 7 entitled "Creating and configuring a public address tri-homed DMZ Network". I have on my ISA2K box three (3) network adapters with the following settings in the following order: Internal: IP: 10.0.0.x Subnet: 255.0.0.x GW: DNS: IP of internal DNS server. DMZ: IP: 172.16.0.x Subnet: 255.0.0.x GW: 172.16.0.1 DNS: 172.16.0.1 External: ISP Static IP IP: 70.148.240.122 Subnet: 255.255.255.248 GW: 70.148.122.121 There is mention in the book on creating static routes to the upstream router to ensure communication between the networks. I'm not sure what the upstream router is and need clarification. Is this a seperate unit functioning as a router or is this the ISA server? Where do I enter this command and is this the correct syntax for the command: router add 172.16.0.0 add 172.16.0.0 0 mask 255.255.0.0 192.168.1.20 Would anyone have any links or articles that cover static routes as they relate to ISA2K4? I'm also trying to determine if the external interface consititutes as a public address? ANY responses are greatly appreciated. ANY!!!