Hi all I am new to this group . I am in the phase of implementation of ISA Server wherein I want to set certain policy based rules as under Server A on LAN wants to provide an incomming access from internet on proprietary port 1413 . Server B which is co-located on web wants to access Server C on LAN on SMTP Port 25 . I am not sure whether should I use Protocol rule or site and content rule,as in protocol rule source node (any server with source addr.) can be define ,also port allowed can be defined ,howver destination address cannot be defined. I would like this to compare with Checkpoint firewall wherein if Server A wants acess to server B via firewall on SMTP PORT ,there is rule base as under Source Addr. Destination Addr Port No. Action Server A Server B 25 Permit Can anybody help me how can I achieve this on ISA Server. Any help will be highly appreciated. Thanks in advance. --------------------------------- Do you Yahoo!? Yahoo! Tax Center - forms, calculators, tips, and more