We currently are using a proxy and also using a secondary DSL connection for failover. The last piece of the puzzle is a .pac file to use the proxy when connected to the primary connection and go directly out the secondary connection in case the primary connection goes down. I am new to .pac files and have used the ones in the past that call for using a direct connection when the network settings are not detected. This works for my laptop users, the problem I am faced with is these workstaions are always connected to the network so this type of .pac file would not work. So in basic terms I need a .pac file that says if the proxy server is detected or reachable, use it. If not go direct.