Open Shortest Path First (OSPF) Authentication Codes (last updated 2009-10-23) Registries included below: - Authentication Codes Registry Name: Authentication Codes Reference: [RFC2328] Range Registration Procedures ---------- ------------------------------------- 0-255 IETF Consensus 256-65535 Reserved and should not be assigned Note: The Open Shortest Path First (OSPF) protocols has a provision for authentication, and the type of authentication can be indicated by a code number. Registry: Code Authentication Method Reference --------- ----------------------------------------- --------- 0 No Authentication [RFC1583] 1 Simple Password Authentication [RFC1583] 2 Cryptographic authentication [RFC2328][RFC5709] 3-255 Unassigned 256-65535 Reserved References ---------- [RFC1583] Moy, J., "OSPF Version 2", RFC 1583, Proteon, Inc., March 1994. [RFC2328] Moy, J., "OSPF Version 2", STD 54, RFC 2328, Ascend, April 1998. [RFC5709] M. Bhatia, V. Manral, M. Fanto, R. White, T. Li, ,M. Barnes, R. Atkinson, "OSPFv2 HMAC-SHA Cryptographic Authentication", RFC 5709, October 2009. []