i have PIX 525, and i want to place it infront of my ISP network. Currently the 7500 router is facing the external network. I want to configure PIX transparently , ie not configure NAT for my internal IP's and use PIX just to monitor all of the traffic coming to my corporate network and allow specific traffic for web, ftp and mail machines. Anybody guide me in this regards, i also tried to search some scenarios to get help for this but not scenarios found, please send me some link or guide me in this regards.also guide me that is it recommended to place it infront of the network ????