Hello, I don't know if it is the same problem as Russ Highton's one. My configuration is the following : A server with ISA Server, IIS and a first secure Web Site reachable on the TCP port 2001. (https://public_IP_address:2001 and https://192.168.1.1:2001) An other server (Linux & Apache) with a second secure web site locally reachable on the same TCP Port 2001. (https://192.168.1.66:2001) I get a fixed public IP Address and I want to see the second web site on the Net but on the TCP Port 4001. The question is : How to make, on the ISA Server, the redirection : Public_IP_Address:4001 --> 192.168.1.66:2001 with SSL ??? Thanks a lot. Laurent THEVENARD