From: Lutz, FL, USA
I there a reason I receive a message no external IP address when I try to create a mail server publishing rule?? Here is my config: Cable modem with dynamic IP to a linksys router to the ISA server. The ISA server has a static IP address of 192.168.x.x and an internal static IP address on the second a card of 10.1.x.x. I have all traffic routed from the LINKSYS to the ISA server. Everything works great, I can publish my webservers and applications. http://www.muller-net.com/wps/portal works. The thing that I can not do is publish a server thru the wizard, like a mail server. It tells me no external IP address. Very odd.....
I had the same problem, what I did was include the all the ip addresses that the LAT would use when constructing the LAT, but I excluded the server I wanted to publish. I have the exact same setup as you and heres what my LAT looks like.
From to 10.9.215.0 10.9.215.99 10.9.215.101 10.9.215.255 10.255.255.255 10.255.255.255 192.168.1.0 192.168.1.255
You will notice I skiped 10.9.215.100, as thats the external ip address I get from the router.
I did have to put the GW 10.9.215.1/80 in the proxy settings of the browser in order to get access to the net.