I'm back and after finally purchasing my first ISA book I'm ready with more newbie questions. I see that the firewall client can be installed on various Microsoft client operating systems, including Windows XP. So I take it this means I need to configure my w2k & .NET servers as secureNAT clients and install the firewall client onto my desktops and laptops? Or I can just install all servers and clients as secureNAT clients? It also seem to state that the secureNAT clients use the web proxy service automatically, should I assume that I need to configure the firewall clients to use web proxy? I'm still on chapter 1 and I may come across it but wanted to ask anyway. Can someone advise from their own experiences? tia