The SIP Firewall controls incoming and outgoing SIP traffic into the Session Manager server based on a set of rules.

The SIP Firewall configuration consists of a collection of Rule Sets. The administrator assigns the SIP Firewall Rule Sets to Session Manager and Branch Session Manager instances in the network. The SIP Firewall routes or drops SIP messages based on the sender, location, and other criteria defined in the Rule Sets.

The IP address field for SIP firewall supports IPv6 addresses if the global settings page has the Enable IPv6 field selected.