I want to set up a frontend backend firewall setup for our company . The frontend firewall will be a sonicwall pro 2040 and the backend will be isa server 2000. I have the 2040 in place running as a frontend. I than put isa server behind it but when I enter the isa servers ip address in as my proxy I can't get to the internet. Is there something that I must do on the frontend firewall for sonicwall pro 2040 to be able to gain internet access and proxy it to the internal lan clients. Also let me tell you the physical setup I have the dsl connected to a switch the external interface of the sonicwall pro 2040 and the isa server is also connected to that switch. The isa box is using the external interface is using the ip address of astaro's internal interface as its gateway.