Which two authentication methods can be used by OSPF?

OSPF supports two different types of authentication that can be configured: authentication limited to a specific interface, or authentication configured over an entire OSPF area.

What is OSPF authentication?

OSPF can be configured to authenticate every OSPF message. This is usually done to prevent a rogue router from injecting false routing information and therefore causing a Denial-of-Service attack. This type of authentication is more secure because the password doesn’t go in clear-text over the network.

Which command enable OSPF authentication on an interface?

Enabling OSPF Authentication: OSPF authentication can be enabling in two ways: 1) Per interface: Authentication is enabling per interface using the “ip ospf athentication” command. 2) Area authentication: Authentication for area can enable using “area authentication” command.

Which parameters should match in OSPF MD5 authentication?

The receiver, which knows the same password, calculates its own hash value. If the message is unchanged, the hash value of the receiver should match the hash value of the sender which is transmitted with the message. Configuring OSPF MD5 authentication is very similar to configuring clear-text authentication.

What do you need to know about OSPF type 2?

OSPF Authentication type 2 means clear text password. For this type you need to do 2 things. First enable authentication and secondly create a password. Lets look at that below. On the same interface we are just going to enable ospf authentication with the command: ip ospf authentication – remember this is under the interface configuration.

Which is the default authentication type in OSPF?

Authentication can be configured on a per area or per interface, but any passwords have to be configured on the interface. The topology being used for this post is very simply 2 routers OSPF authentication type 1 means no authentication and is the default on any link.

How to verify that r1 is Using OSPF MD5 authentication?

You can verify that R1 is using OSPF MD5 authentication by typing the show ip ospf INTERFACE/INTERFACE_TYPE command: OSPF authentication type can also be enabled on an area basis, instead of configuring OSPF authentication type per interface basis.

Which is more secure clear text or OSPF?

This type of authentication is more secure because the password doesn’t go in clear-text over the network. With OSPF authentication turned on, routers must pass the authentication process before becoming OSPF neighbors. To configure clear text authentication, the following steps are required: