One of the things we used to do a lot of with the ISA firewall was publish web sites on alternate ports. While there’s little to be gained from a security perspective from doing this, there is the advantage of conserving IP addresses, since you can use the same IP address and publish multiple sites on that address by using different port numbers.
However, if you tried to do the same thing with TMG SP1, you might be surprised to find a strange error comes up that say the Web Listener is configured to use SSL, even when it’s not.
What’s up with that?
There appears to be a problem with user interface so you have to run a script to use the port you need.
Check out the details over at:
DEBRA LITTLEJOHN SHINDER
MVP (Enterprise Security)