Hello All, I have aproblem to setting My ISA server to do this Scheme : I Have 3 segment of Network : 172.16.xxx.xxx , 10.17.xxx.xxx, & 192.168.xxx.xxx and i have 3 NIC in my ISA Server I use ISA Server for gateway for these network and i want to block ip 10.17.xxx.xxx to access the ip 192.168.xxx.xxx but i can access ip 172.16.xxx.xxx I want ip 172.16.xxx.xxx can access 10.17.xxx.xxx and 192.168.xxx.xxx Is anyone can tell me to set my ISA to do this Scheme? Thanks Barry Allan