Q: I have a Cisco switch in my network, which I can access by hooking up a console cable directly to the device. I like to access the switch remotely using SSH. How can I enable ssh on my Cisco 3750 Catalyst Switch?
A: By default, when you configure a Cisco device, you have to use the console cable and connect directly to the system to access it. Follow the steps mentioned below, which will enable SSH access to your Cisco devices. Once you enable SSH, you can access it remotely using PuTTY or any other SSH client.

Aug 31, 2019  SSH authentication on Cisco NX-OS devices provide X.509 digital certificate support for host authentication. An X.509 digital certificate is a data item that. Junos Generating SSH RSA/DSA keys locally on devices running Junos OS. Enable SSH service on the switch using the following command. Once the keys are generated we can associate the key with the 'userid' using the following command. Aug 22, 2013.

1. Setup Management IP

Switch

First, make sure you have performed basic network configurations on your switch. For example, assign default gateway, assign management ip-address, etc. If this is already done, skip to the next step.

Using Rsa Keys Generated From Switch Key

In the following example, the management ip address is set as 192.168.101.2 in the 101 VLAN. The default gateway points to the firewall, which is 192.168.101.1

  • Use the ssh-keygen tool to create a key pair. Log in as the administrator user defined on the service form. Start the ssh-keygen tool. Issue the following command. Mydesktop$# ssh-keygen -t rsa. At the following prompt, accept the default or enter the file path where you want to save the key pair and press Enter.
  • Generate RSA keys with SSH by using PuTTYgen. One effective way of securing SSH access to your cloud server is to use a public-private key pair. This means that a public key is placed on the server and a private key is placed on your local workstation.
  • Oct 02, 2015 SSH Config and crypto key generate RSA command. Use this command to generate RSA key pairs for your Cisco device (such as a router). Keys are generated in pairs–one public RSA key and one private RSA key. If your router already has RSA keys when you issue this command, you will be warned and prompted to replace the existing keys with new keys.

2. Set hostname and domain-name

Using Rsa Keys Generated From Switch Code

SSH is a must use tool for system administrators. However, residing access security on a human entered password is not very wise. Script kiddies may break into your system due to a lazy user with a weak password. And it is beyond the system administrator power to make users choose good passwords.

Next, make sure the switch has a hostname and domain-name set properly.

3. Generate the RSA Keys

The switch or router should have RSA keys that it will use during the SSH process. So, generate these using crypto command as shown below.

Also, if you are running on an older Cisco IOS image, it is highly recommended that you upgrade to latest Cisco IOS.

4. Setup the Line VTY configurations

Setup the following line vty configuration parameters, where input transport is set to SSH. Set the login to local, and password to 7.

If you have not set the console line yet, set it to the following values.

5. Create the username password

If you don’t have an username created already, do it as shown below.

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Using Rsa Keys Generated From Switch

Note: If you don’t have the enable password setup properly, do it now.

Make sure the password-encryption service is turned-on, which will encrypt the password, and when you do “sh run”, you’ll seee only the encrypted password and not clear-text password.

5. Verify SSH access

From the switch, if you do ‘sh ip ssh’, it will confirm that the SSH is enabled on this cisco device.

After the above configurations, login from a remote machine to verify that you can ssh to this cisco switch.

Using Rsa Keys Generated From Switch 2017

In this example, 192.168.101.2 is the management ip-address of the switch.

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Generate key pair linux from pem to key. After this, you can browser to the directory where you.pem file is located, and load it.Once the.pem file is loaded, you’ll get a pop-up message saying “Successfully imported foreign key (OpenSSH SSH-2 private key)”. Click on this drop-down list and choose “All Files” as shown below. Load PEM file to PuTTYGen for ConversionIn the following PuTTYGen main screen, click on “Load” button, and select your AWS PEM file.Please note that when you click on “Load”, in the file selection window, by default, it will show “PuTTY Private Key Files (.ppk)” as the option.