Hi all, my problem is .. the internal interface of router is 192.168.1.0 (NAT) and my network is also 192.168.1.0. Using NAT on DSL router so if i add ISA in between, either i have to change the internal interface of router to some other network or have to change my internal network's IP ? (as ISA cant have both interfaces on same network) so how to go about this? is there any tutorial or article which describes how to do this, to Use ISA as routed and not as NAT server.. what i mean is a network like this current : Internet---(69.20.--.-- )--->Router --(192.168.1.0)--> Network What i want : Internet--(69.20.-.-)--> Router--(192.168.20.0)-->ISA-(192.168.1.0)->network where the NAT mappings of 69.20.--.-- to 192.168.1.0 remain on router Thanks