Communications Server OSPF (Open Shortest Path First) dynamic routing protocol supports message authentication and message integrity of OSPF routing messages through the use of the OSPF MD5 Authentication security protocol as defined by RFC 2328. OSPF MD5 Authentication ensures that an unauthorized IP resource cannot inject OSPF routing messages into the network without detection, thus ensuring the integrity of the routing tables in the OSPF routing network.
OMPROUTE computes a secure MAC for the routing message using the MD5 algorithm. This MAC is sent with the routing message so that the message can be authenticated by the receiver.