I have a UT box in the following setup:
Firewall (performs 1:1 NAT and PAT)
Untangle (in router mode)
Internal network (all private IPs)
I have a host of machines in my internal network, some of which are 1:1 NATed (one Public IP <--> one private IP) and some are "Hiding NATed or PAT Port Address Translation" (multiple private IPs go out to the Internet with one Public IP, which is the firewalls external interface IP). This NAT ing is done by the firewall and not by UT.
I have removed the 0.0.0.0/0 auto NAT policy from the UT Internal interface config.
I would like to know what are the port forward rules which I have to specify for:
1. Two different internal mail servers (with pvt IPs but which are 1:1 NATed at the firewall with individual public IPs?
2. Systems on various internal networks with private IPs which access the Internet through PAT?
Thanks in advance.