Lab 4.3.2.2 OSPF Authentication

Objective:

Configure OSPF area 0 authentication.

Scenario:

The BubbaGump ISP now has a hacker attacking their open OSPF WAN. You have been called on to password protect the OSPF routing protocol on their network.

From the "Router A" console

  1. Turn on authentication and configure the fastethernet interfaces with an authentication password by issuing the following commands:
  • router-a(config)#router ospf 1
  • router-a(config-router)#area 0 authentication
  • router-a(config)#interface fastethernet 0/0
  • router-a(config-if)#ip ospf authentication-key cisco
  • router-a(config-if)#control Z
  1. Write the running-configuration to memory
  2. Enter show ip ospf neighbors and report below the routers listed

  1. Enter show ip ospf database

What routers are listed? Why?

From the "Router B" console

  1. Configure authentication with the same password on "Router B"
  2. Enter show ip ospf neighbor

What routers are listed?

  1. Enter debug ip ospf adj and report your findings below:

  1. Add the Cisco authentication key to all the routers in OSPF area 0, write the running-configurations of all the routers to memory, and reboot all routers in OSPF area 0.

From the "Router B" console

  1. Enter enable exec mode and issue the command show ip ospf neighbor

List below the router IDs of the routers in OSPF area 0