Table of Contents
What is the command to configure SSH version 2?
Steps to configure SSH: Configure the router hostname using command “hostname”. Configure the domain name using command “ip domain-name”. Generate public and private keys using command “crypto key generate rsa”.
What is SSH protocol used for?
SSH or Secure Shell is a network communication protocol that enables two computers to communicate (c.f http or hypertext transfer protocol, which is the protocol used to transfer hypertext such as web pages) and share data.
Is SSH a Layer 4 protocol?
SSH, or Secure Shell, is a network protocol that allows one computer to securely connect to another computer over an unsecured network, like the internet, by having a shared agreement of how to communicate. SSH is an application layer protocol, which is the 7th layer of the OSI model.
How many SSH versions are there?
There are mainly two versions of SSH protocol. The initial version was SSH-1, which was released in July 1995. In 2006, IETF (Internet Engineering Task Force) published RFCs for a revised version of the SSH protocol SSH-2 as the standard. The two versions of SSH, SSH-1 and SSH-2 are not compatible.
What is crypto key generate RSA?
Syntax: crypto key { generate | zeroize } rsa [ modulus modulus-size ] The generate keyword places an RSA host key pair in the flash memory and enables SSH on the device, if it is not already enabled. The optional [modulus modulus-size ] parameter specifies the modulus size of the RSA key pair, in bits.
Why is SSH so popular?
It has been over a decade since OpenSSH became the de facto standard of remote access protocols, and in that time, Internet connectivity has changed dramatically. For reliable, low-latency LAN and Internet connections, SSH is still the king due to its simplicity, speed, and security.
What layers does SSH use?
The SSH protocol is composed of three layers: the transport layer, the authentication layer, and the connection layer. SSH-CONNECT – The connection layer runs over the user authentication protocol.
Does SSH use RSA?
A previous version of the SSH protocol, described in [SSH1], uses a key-exchange method based on Rivest-Shamir-Adleman (RSA) public-key encryption, which consumes an order of magnitude less CPU time on the client, and hence is particularly suitable for slow client systems such as mobile devices.
How do I make an rsa key?
How to Create a Public/Private Key Pair
- Start the key generation program.
- Enter the path to the file that will hold the key.
- Enter a passphrase for using your key.
- Re-enter the passphrase to confirm it.
- Check the results.
- Copy the public key and append the key to the $HOME/.
How do I check my crypto key rsa?
You can view the configured key by issuing the “show crypto key mypubkey rsa” command. If you are unsure about the size of the key you can always create a new one to the size that you want.
Is SSH same as TLS?
SSH and SSL/TLS generally have different purposes. SSH is often used by network administrators for tasks that a normal internet user would never have to deal with. SSL/TLS, on the other hand, is used by the average internet user all the time.
What’s new in SSH version 2 enhancements for RSA keys?
The SSH Version 2 Enhancements for RSA Keys feature also supports RSA-based public key authentication for the client and the server. User authentication—RSA-based user authentication uses a private/public key pair associated with each user for authentication.
How do I enable SSH on my IP SSH RSA?
If you configure the ip ssh rsa keypair-name command with a key pair name, SSH is enabled if the key pair exists or SSH will be enabled if the key pair is generated later. If you use this command to enable SSH, you are not forced to configure a hostname and a domain name, which was required in SSH Version 1 of the Cisco software.
What SSH keys can be used with SSH-2?
A DSA key for use with the SSH-2 protocol. An ECDSA (elliptic curve DSA) key for use with the SSH-2 protocol. An Ed25519 key (another elliptic curve algorithm) for use with the SSH-2 protocol.
What version of SSH do I use with Rivest?
If you do not want your device to fall back to the undefined protocol (Version 1), you should use the ip ssh version command and specify Version 2. The ip ssh rsa keypair-name command enables an SSH connection using the Rivest, Shamir, and Adleman (RSA) keys that you have configured.