How do I create an RSA key on my Cisco router?

How do I create an RSA key on my Cisco router?

Router1# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)# crypto key generate rsa The name for the keys will be: Router1.oreilly.com Choose the size of the key modulus in the range of 360 to 2048 for your General Purpose Keys.

What are RSA keys used for?

An RSA key pair includes a private and a public key. The RSA private key is used to generate digital signatures, and the RSA public key is used to verify digital signatures. The RSA public key is also used for key encryption of DES or AES DATA keys and the RSA private key for key recovery.

Which command will generate the SSH encryption keys?

Using this understanding, we can use the ssh-keygen command to generate SSH key pairs using various algorithms and of varying lengths. We can then use these key pairs to authenticate automatically with applications that support SSH.

Which command is used to generate local RSA keys that will be used for SSH connections to a Cisco IOS device?

SSH Server When you use the crypto key generate rsa command, it will ask you how many bits you want to use for the key size.

What is Ed25519 key?

It provides for an extensible variety of public key algorithms for identifying servers and users to one another. Ed25519 is a digital signature system. OpenSSH 6.5 introduced support for using Ed25519 for server and user authentication. Compatible support for Ed25519 has since been added to other SSH implementations.

What does the command crypto key pubkey-chain RSA do?

The command crypto key pubkey-chain rsa changes the command mode from global config mode to public key chain configuration mode (indicated by prompt changing to config-pubkey-chain). The public key chain is the set of all public keys this router possesses—it’s similar to a real-world key chain.

How does RSA public key cryptography work with Ike?

A router using IKE with RSA encryption (RSA public key cryptography) is configured with the non-secret, public keys of its peers. This makes the exchanging of keys less problematic than authentication with secret, pre-shared keys. However, a device must be manually configured with the public key of every peer with which it builds an IKE SA.

What is the public key chain of a router?

The public key chain is the set of all public keys this router possesses—it’s similar to a real-world key chain. The command addrcsscd-key 192.168.1.2 tells the router that you wish to enter a public key for remote peer 192.168.1.2 (Router B’s Serial 1 interface).

How long does it take to generate RSA key pair?

Generate RSA Key Pair. Depending on the size of the key and the CPU power of your router, the time to generate the key pair can range from I second (Cisco 4700 router and a 512-bit length) to over an hour (Cisco 2500 router and a 2048-bit length). RSA keys smaller than 512 bits are not recommended.