Configuring firewalls includes configuring both of the following:
- The internal firewall between the perimeter network and your
internal network.
- The external firewall between the perimeter network and the
Internet.
How you configure your firewalls is largely dependent on the
specific firewalls you use in your organization, but each firewall
has common configuration requirements that are specific to Office
Communications Server 2007 R2. For a list of required firewall
settings, see