Hie, I managed to configurate ISA as reverse proxy, thx for your help Sharma. But Now I do not manage to configurate Web rule as I would like it works. I have a test configuration with 3 machines, a remote client(10.6.152.109), Isa server(10.6.152.98 and 192.168.100.104) and an internal web server(192.168.100.100) What I would like is: if I enter url http://10.6.152.98/9052.htm I am redirected to 192.168.100.100:9052 and if I type http://10.6.152.98/9871.htm I am redirected to 192.168.100.100:9871 In fact what I do not manage to do is checking the all url to redirect to one or another web server. Do I forgot sthg?