I'm working on putting ISA server in our school, we currently are running about half and half internal IP's and External IP's. This was pretty easy running two scopes on a single DHCP server with two nics and having internet connection sharing going. Now that I've put ISA in as a replacement for that server, I can't get DHCP to work for the external network. I'm guessing this is because broadcast messeges are getting blocked. Is there anyway for ISA to serve out external IP's to the rest of my network until I'm able to move everything inside this summer. Thanks for your help.