Internet Assigned Numbers Authority Open Shortest Path First (OSPF) Authentication Codes Last Updated 2015-04-14 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registry included below * Authentication Codes Authentication Codes Registration Procedure(s) IETF Review Reference [RFC2328][RFC6549] 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. Available Formats [IMG] CSV Code Authentication Method Reference 0 No Authentication [RFC1583] 1 Simple Password Authentication [RFC1583] 2 Cryptographic authentication [RFC2328][RFC5709] 3 Cryptographic Authentication with Extended Sequence Numbers [RFC7474] 4-255 Unassigned 256-65535 Deprecated [RFC6549] Licensing Terms