smtp forward to lan segment via a single homed ISA 2k4
Posted on 2006-06-25
Many thanks in advance.
I have been assigned the task of supplying web caching and incoming SMTP forwarding ISA2004 server. The isa server is only allowed one nic.
The design I have been provided uses a PIX holding several real world IP addresses. SMTP traffic is passed to the ISA server sitting within a DMZ. The PIX is responsible for blocking data except SMTP. ISA is meant to further forward any SMTP to the IP of Linux SME server. This server sits on the local LAN
DMZ network 172.16.18.0 /24
Lan mail server = 10.101.10.2
Any recommendations on best how to do this? I have been told that giving my ISA server 2 nic’s is not an option. and that I should find a way to port forward ?