authenticate ISA users via IP address.

[cameramonkey]

I have a private LAN with ISA server on a file/print server with only one NIC. It is setup as a passive caching proxy, so that it doesnt provide security and firewalling as much as it cuts down on the bandwidth usage. Nobody is "forced" to use the proxy. Its just configured on the browsers. Due to security concerns, we dont want our file/print server directly connected to the WAN via the traditional ISA config with a second NIC. That isnt an option.

We have several "public" workstations for our corporate guests on the lan that are not logging into the domain due to security, and more importantly licensing costs. We are trying to get them to use the ISA server as a standard proxy, but without needing to provide a user/password.

There is a rule to allow any IP from the 192.168.1.1-192.168.1.254 range. All instances of "require user authentication" appears to have been disabled. Does that IP option not provide enough authentication?

Is there a way to do what I want to do? Or do I have to buck up and buy another 5 pack of CALs just to be able to use ISA without having our visitors have to log in?

I had a Proxy 2.0 server setup on another network that we were able to do this.(novell network, with the NT box acting as a dedicated caching proxy)