In ISA for SecureNAT, how does one forward ports to an internal client? Hopefully, the firewall client is not required for this. Say for example, that I want an internal client to receive all packets for ports 5000-6000 for TCP and/or UDP.
You need to use server publishing. The catch here is that if the port connection for SecureNAT needs secondary port to be opened then it would not work. Either you write you own application filter or use thrid party software.