Hi ... Could you please clarify the following? 1) If the ISA server is not directly connected to the Internet i.e if it has to go through another firewall (internet gateway which gives access only to the ISA server's IP) and a router, and all other workstations are in the same LAN Subnet, is it still mandatory that the ISA Server has to have two NICs? By the way, the ISA is serving only as a Caching proxy server. Please suggest Arun This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.