Hi, I'm running now a single ISA Server in cache mode at the server segment. I would like to install a second ISA server in cache mode to provide high availability. I'm running this server in a Windows 2000 domain (mixed mode). The clients are all web clients (I don't use the firewall client). I have a "real firewall" between the internet and our ISA Server. What do I have to setup ? An array or 2 ISA servers with WLBS. High availability is more important for us than Load balancing. It's not possible to install the firewall client software on each client computer because I have to many clients and I want to keep it simple for my end-users. _____________________________________ Cosman Peter, System Administrator A.Z. St.-Jan Brugge Ruddershove 10 8000 Brugge Tel.: +32-50-452269 Fax: +32-50-452238 E-mail: peter.cosman@xxxxxxxxxxx _____________________________________