Cisco 9400 Generate Ssh Key
Posted By admin On 15.04.20Introduction
This document describes how to generate a private secure shell (SSH) key and use that for username and authentication when logging into the command line interface (CLI) on the Cisco Email Security Appliance (ESA).
How to configure SSH Public Key Authentication for login to the ESA without a password
I am looking into deploying Virtual Stackwise on the Catalyst 9400 series switches. I wanted to know based on best practices where should the VSL links be deployed on the Sups or the modules? Hi I was trying to generate ssh key for a switch I read that, ssh key is generated as a combination of hostname and domain-name I created a domain. How I create RSA key and enable SSH access in Cisco VG202, in a Cisco router I use the next commands(but in a VG not exists): conf t. Crypto key generate rsa modulus 1024. Ip domain-name domain-name. Ip ssh version 2. Create an RSA keys: Ciscozine(config)#crypto key generate rsa label ciscozine-rsa modulus 2048 The name for the keys will be: ciscozine-rsa% The key modulus size is 2048 bits% Generating 2048 bit RSA keys, keys will be non-exportable. Aug 22, 2013.
Public-key authentication (PKI) is an authentication method that relies on a generated public/private keypair. With PKI, a special 'key' is generated which has a very useful property: Anyone who can read the public half of the key is able encrypt data which can then only be read by a person who has access to the private half of the key. In this way, having access to the public half of a key allows you to send secret information to anyone with the private half, and to also verify that a person does in fact have access to the private half. It's easy to see how this technique could be used to authenticate.
As a user, you can generate a keypair and then place the public half of the key on a remote system, such as your ESA. That remote system is then able to authenticate your user ID, and allow you to login just by having you demonstrate that you have access to the private half of the keypair. Windows 7 enterprise mak key generator. This is done at the protocol level inside SSH and happens automatically.
It does, however, mean that you need to protect the privacy of the private key. On a shared system where you do not have root this can be accomplished by encrypting the private key with a passphrase, which functions similarly to a password. Before SSH can read your private key in order to perform the public key authentication you'll be asked to supply the passphrase so that the private key can be decrypted. On more secure systems (like a machine where you are the only user, or a machine at your home where no strangers will have physical access) you can simplify this process either by creating an unencrypted private key (with no passphrase) or by entering your passphrase once and then caching the key in memory for the duration of your time at the computer. OpenSSH contains a tool called ssh-agent which simplifies this process.
ssh-keygen example for Linux/Unix
Complete the following steps to set up your a linux/unix workstation (or server) to connect to the ESA without a password. In this example, we will not specify as passphrase.
1) On your workstation (or server), generate a private key using the Unix command ssh-keygen:
(*the above was generated from an Ubuntu 14.04.1)
2) Open the public key file (id_rsa.pub) created in #1 and copy the output:
Cisco 9400 Generate Ssh Key Mac
3) Login to your appliance and configure your ESA to recognize your workstation (or server) using the public SSH key that you created in #1, and commit the changes. Notice the password prompt during login:
4) Exit out of the appliance, and re-login. Notice the password prompt is removed, and access is directly granted:
ssh-keygen example for Windows
Complete the following steps to set up your a Windows workstation (or server) to connect to the ESA without a password. In this example, we will not specify as passphrase.
Note: There are a variation on console application used from Windows. You will need to research and find the solution that works best for your console application. This example will use PuTTy and PuTTyGen.
1) Open PuttyGen.
2) For Type of key to generate, select SSH-2 RSA.
3) Click the Generate button.
Cisco Switch Generate Ssh Keys
4) Move your mouse in the area below the progress bar. When the progress bar is full, PuTTYgen generates your key pair.
5) Type a passphrase in the Key passphrase field. Type the same passphrase in the Confirm passphrase field. You can use a key without a passphrase, but this is not recommended.
6) Click the Save private key button to save the private key.
Note: You must save the private key. You will need it to connect to your machine.
7) Right-click in the text field labeled Public key for pasting into OpenSSH authorized_keys file and choose Select All.
8) Right-click again in the same text field and choose Copy.
9) Using PuTTY, login to your appliance and configure your ESA to recognize your Windows workstation (or server) using the public SSH key that you saved and copied from #6 - #8, and commit the changes. Notice the password prompt during login:
10) From the PuTTy configuration window, and your pre-existing Saved Session for your ESA, choose Connection > SSH > Auth and in the Private key file for authentication field, click Browse and find your saved private key from step #6.
11) Save the Session (profile) in PuTTY, and click Open. Login with the username, if not already saved or specified from the pre-configured Session. Notice the inclusion of 'Authenticating with public key '[FILE NAME OF SAVED PRIVATE KEY]' when logging in: