We would like to install isa server as a proxy on 2003 server. We are using it within a secure network. In other words, the machine will not be exposed to the Internet. What are some security concerns we should be looking at? In one article I found it specifically stated not to enable file sharing and client for microsoft networks. Is this really an issue if we will not be exposed to Internet traffic? Most of the recommendations I see on the we are for the firewall aspect of ISA. TIA