I used proxy server 2.0 and ISA server in the different machine. I installed proxy server 2.0 in NT 4.0 server and installed ISA Server in W2000 Server. our members who use each system are 150 people. i compare between proxy server 2.0 and ISA Server, but i wonder the ISA Server more slowly and proxy server 2.0 fast when i use access some site (i compare with the same site between isa server and proxy server 2.0). and i read about isa server, did i have a mistake when i set isa server configuration? both of the system use access policy for each groups.