Example 6-11. Configuring Area-Based OSPF Authentication
hostname(config)# router ospf 1
! Enabling area-wide Simple (clear-text) authentication
hostname(config-router)# area 0 authentication
! Enabling area-wide MD5 authentication
hostname(config-router)# area 0 authentication message-digest
! Configure OSPF key on the interface
hostname(config-router)# interface inside
! Configuring Simple password authentication key
hostname(config-interface)# ospf authentication-key cisco
! Configuring MD5 authentication key
hostname(config-interface)# ospf message-digest-key 1 md5 cisco
Alternatively, authentication can be enabled specifically on a link basis (per-interface) and not areawide. This
means that both sides of the link on the connected devices must be configured similarly. Example 6-12 shows
how to configure interface-based OSPF authentication on the Security Appliance.
Example 6-12. Configuring Interface-Based OSPF Authentication
hostname(config-router)# interface inside
! Configuring Simple password authentication and key
hostname(config-interface)# ospf authentication
hostname(config-interface)# ospf authentication-key cisco
! Configuring MD5 authentication and key
hostname(config-interface)# ospf authentication message-digest
hostname(config-interface)# ospf message-digest-key 1 md5 cisco
Monitoring OSPF
Several useful show commands are available for displaying general information and other OSPF-related
information, such as neighbor adjacency status, interface parameters, virtual-link status, and border-routers.
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