What is authentication in OSPF?
OSPF MD5 Authentication ensures that an unauthorized IP resource cannot inject OSPF routing messages into the network without detection, thus ensuring the integrity of the routing tables in the OSPF routing network.
What is the default authentication of OSPF?
There are three different types of authentication available for OSPF version 2: 1) Null authentication: Null authentication means that there is no authentication, which is the default on Cisco routers.
What is MD5 authentication OSPF?
The OSPF MD5 authentication is more secure than the plain text authentication. This method uses the MD5 algorithm to compute a hash value from the contents of the OSPF packet and a password. This hash value is transmitted in the packet. The receiver, which knows the same password, calculates its own hash value.
What is ip OSPF authentication message digest?
Message-Digest authentication is a cryptographic authentication. A key (password) and key ID are configured on each router. The router uses an algorithm based on the OSPF packet, the key, and the key ID to generate a message digest that appends to the packet.
Are OSPF routing protocol exchanges authenticated?
Are OSPF routing protocol exchanges authenticated? Yes, OSPF can authenticate all packets exchanged between neighbors. Authentication may be through simple passwords or through MD5 cryptographic checksums.
Which authentication types does OSPF support?
RFC 2328, which defines OSPF Version 2, includes three different types of authentication for OSPF: null authentication, simple password authentication, and cryptographic authentication. …
What authentication protocol options are available when using OSPF authentication?
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 area?
By definition an OSPF area is a collection of networks, not a collection of routers. A backbone network segment is an IP subnet that belongs to the area identified by 0.0. 0.0. Areas that are not physically connected to the backbone are logically connected by a backbone ABR using an OSPF virtual link.