Ccna security Lab Securing the Router for Administrative Access

Configure the serial interfaces to use OSPF authentication

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2.6.1.2 Lab - Securing the Router for Administrative Access PT-1

Use the ip ospf authentication command to assign the key-chain to the serial interface on R1 and R3.

R1(config)# interface S0/1/0

R1(config-if)# ip ospf authentication key-chain NetAcad

R1(config)#

Feb 17 21:24:45.309: %OSPF-5-ADJCHG: Process 1, Nbr 10.2.2.2 on Serial0/0/0 from FULL to DOWN, Neighbor Down: Dead timer expired

R3(config)# interface s0/1/1

R3(config-if)# ip ospf authentication key-chain NetAcad

R3(config)#

*Feb 17 21:23:14.078: %OSPF-5-ADJCHG: Process 1, Nbr 10.2.2.2 on Serial0/0/1 from FULL to DOWN, Neighbor Down: Dead timer expired

Use the ip ospf authentication command to assign the key-chain to both serial interfaces on R2.

R2(config)# interface S0/1/0

R2(config-if)# ip ospf authentication key-chain NetAcad

R2(config)# interface serial 0/1/1

R2(config-if)# ip ospf authentication key-chain NetAcad

R2(config-if)#

Feb 17 21:36:25.114: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.1.1 on Serial0/0/0 from LOADING to FULL, Loading Done

Feb 17 21:36:30.686: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.3.1 on Serial0/0/1 from LOADING to FULL, Loading Done

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