Of all the mysteries confronted by the ISA Server administrator, perhaps the most difficult one to solve is how to configure intradomain communications across the ISA Server. For over a year, it has been consensus opinion that intradomain communications could not take place across an ISA Server because of problem with dynamic protocol/port assignments, Kerberos, and a variety of other "hand-waving" explanations. I admit to being part of this hand-wavers crowd because I didn’t know precisely the cause of intradomain communications failure across an ISA Server.
Protocol rules identify which protocols may be utilized for communication, between the internal network and external public domain or Internet. Protocol rules are processed at the application level of the OSI model.
Protocol rules dictate to ISA clients which protocols can be utilized to access resources on the Internet. Protocol rules can be configured to allow or deny the use of one or more protocol definitions.
One particularly vexing problem that comes up often on the ISAserver.org mailing list and Web boards is how to deal with installing ISA Server on a domain controller (DC). Although its generally a bad idea from a security standpoint to install ISA Server on a DC, people stuck with Small Business Server (SBS) apparently have to put all of their eggs in one basket.
Site and content rules are an integral part of ISA server, and require a good understanding in order to configure ISA server to perform the functions described below. These rules are a very powerful part of ISA and mastering them will help you to get the results required by your organization.
The streaming media filter enables secure network address translation (Secure NAT) and ISA Firewall clients to use streaming media protocols to access media streaming resources on the internet. In this tutorial I will outline what is involved in making streaming media filter available to internal ISA clients.
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