Internet Group Management Protocol with Access Control

{{Short description|Protocol for establishing secured multicast group memberships on IPv4 networks}}

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The Internet Group Management Protocol with Access Control (IGMP-AC) has been designed for incorporating AAA protocol functionality in the existing IP multicast model. It will enforce authentication and authorization of an end user or receiver before joining or leaving a secured multicast group. To add AAA functionality, an access router or one-hop router of the receiver will act as a network access server (NAS).

IGMP-AC is an extended version of Internet Group Management Protocol version 3.{{Cite book |last1=Islam |first1=Salekul |last2=Atwood |first2=J. William |chapter=The Internet Group Management Protocol with Access Control (IGMP-AC) |date=2006 |title=Proceedings. 2006 31st IEEE Conference on Local Computer Networks |publisher=IEEE |pages=475–482 |doi=10.1109/LCN.2006.322142|isbn=1-4244-0418-5 }} It provides a generic client-server authentication protocol, where the receiver or end user will act as a client, the AAA server will act as a server and the access router (one-hop router of the receiver) will perform the forwarding task. Thus, any suitable authentication protocol (e.g., Extensible Authentication Protocol (EAP)) having client-server entities can be encapsulated over the IGMP-AC architecture. The IGMP-AC will not disrupt the usual function of the IGMPv3 (to be used for classical multicast group), and the access control mechanism of IGMP-AC will take place to join/leave a secured or restricted multicast group only.