OSPF Authentication

OSPF supports 2 types of authentication:

• Simple passworkd (or plain text) authentication
• MD 5 authentication.

1. Router generates and checks every OSPF packet. Router authenticates the source of each routing update packet that it receives.
2. Configure a “key” (password); each participating neighbor must have same key configured.

Neighbor Authentication:
1. Clear text mode.
Router(config-if)# ip ospf authentication-key password
Router(config-if)#ip ospf authentication
Router(config-if)#ip ospf authenticatio-key [password]
2. MD5 Authentication
Router(config-if)#ip ospf authentication message-digest
Router(config-if)#ip ospf message-digest-key 1 md5 cisco
Area Authentication:
1. Clear text Authentication
Router(config-router)#area [area number] authentication
Router(config-if)#ip sopf authentication-key [password]
2. MD5 Authentication
Router(config-router)#area [area number] authentication message-digest
Router(config-if)#ip sopf authentication-key 1 md5 cisco