In this tutorial we are going to learn how to configure OSPF MD5 Authentication in cisco packet tracer.
OSPF MD5 Authentication is very semilar to the cler text authentication
Note :- While configuring the OSPF MD 5 authentication you must keep these 2 things in mind which are given blow
- You need to configure the md5 value on an interface by using IP OSPF message-digest-key 1 md5 value interface command
- You need to configure the interface to use MD5 authentication by using the IP OSPF authentication message-digest interface command
Firstly assign the ip address to the router and pc and
configuration on R1:
Router>enable
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/0
Router(config-if)#ip add 1.0.0.1 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#int f0/1
Router(config-if)#ip add 2.0.0.1 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
Router(config-if)#exit
Router(config)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
configuration on R2:
Router>
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/0
Router(config-if)#ip add 2.0.0.2 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
exit
Router(config)#int f0/1
Router(config-if)#ip add 3.0.0.1 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
exit
After assining the ip address to the routers and pc’s now we are doing ospf routing here.
Routing configuration on R1:
Router(config)#
Router(config)#router ospf 1
Router(config-router)#network 1.0.0.0 0.255.255.255 area 0
Router(config-router)#network 2.0.0.0 0.255.255.255 area 0
Router(config-router)#
Routing configuration on R2:
Router(config)#
Router(config)#
Router(config)#router ospf 1
Router(config-router)#network 2.0.0.0 0.255.255.255 area 0
Router(config-router)#network 3.0.0.0 0.255.255.255 area 0
Router(config-router)#
After assining the ip address and routing now we have to configure OSPF MD5 Authentication
OSPF MD5 Authentication on R1:
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/1
Router(config-if)#ip ospf message-digest-key 1 md5 ccna123
Router(config-if)#ip ospf authentication message-digest
Router(config-if)#exit
OSPF MD5 Authentication on R2:
Router(config)#
Router(config)#int f0/0
Router(config-if)#ip ospf message-digest-key 1 md5 ccna123
Router(config-if)#ip ospf authentication message-digest
Router(config-if)#exit
Now how to check our OSPF MD5 Authentication is done or not
How To Check On R1
Router#show ip ospf int f0/1
How To Check On R2
Router#show ip ospf int f0/0
This is all how to configure OSPF MD5 Authentication with assining the ip addresss and routing
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