next section, we discussed the details of creating and configuring a public address trihomed DMZ (perimeter) network. We discussed reasons for using access rules instead of publishing rules to allow access to DMZ hosts, and described how to publish a public address DMZ host using access rules and how to test the rules.
Finally, we covered how to allow intradomain communications through an ISA Server Firewall. We discussed protocols required for intradomain communications and showed you how to edit the registry on your domain controllers to limit ports required for RPC to a single port, in order to make it easier to analyze the logs.