Patent ID: 8613073

Claim:
A system for Diameter routing and firewall filtering, the system comprising: a Diameter signaling router, comprising: a network interface for receiving, from a first Diameter node, a first Diameter message having Diameter information, wherein the Diameter information includes Diameter header portion information; a firewall module configured to determine whether the first Diameter message satisfies a firewall policy, wherein the firewall policy is based on at least a portion of the Diameter header portion information in the first Diameter message, wherein the firewall module includes functionality for performing an equipment identity register (EIR) dip using information from the first Diameter message, wherein the functionality for performing an EIR dip includes an EIR database for storing equipment-related information used in determining whether user equipment is authorized or blocked and an EIR dip function for accessing the EIR database in determining whether equipment-related information associated with the first Diameter message is present in the EIR database; and a routing module configured to forward at least a portion of the first Diameter message towards a second Diameter node in response to the first Diameter message satisfying the firewall policy, wherein the second Diameter node is a home subscriber server (HSS) or a mobility management entity (MME).