Session Initiation Protocol (SIP) Firewall for Internet Multiimedia Subsystem (IMS) Core

As the deployments of the Session Initiation Protocol (SIP) accelerate, there is a comparable need to secure the SIP infrastructure. One way to do so is through a SIP firewall, which is loosely defined as a device that blocks attacks mounted through SIP. In this definition, a firewall is indistinguishable from a Session Border Controller (SBC), also used by SIP service providers to secure their networks.