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Dell Chassis Management Controller Version 3.10 for Dell EMC PowerEdge VRTX User's Guide

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Generating Public Keys for Systems Running Windows

Before adding an account, a public key is required from the system that accesses the CMC over SSH. There are two ways to generate the public/private key pair: using PuTTY Key Generator application for clients running Windows or ssh-keygen CLI for clients running Linux.

This section describes simple instructions to generate a public/private key pair for both applications. For additional or advanced usage of these tools, see the application Help.

To use the PuTTY Key Generator to create a basic key for clients running Windows:

  1. Start the application and select SSH-2 RSA or SSH-2 DSA for the type of key to generate (SSH-1 is not supported).
  2. Enter the number of bits for the key. Ensure that the RSA key size is between 1024 and 4096.
    • NOTE:
      • The recommended DSA key length is 1024.
      • CMC may not display a message if you add keys less than 1024 or greater than 4096, but when you try to log in with these keys, CMC stops responding.
      • For DSA keys greater than 2048, use the following RACADM command. CMC accepts RSA keys up to key strength 4096, but the recommended key strength is 1024. 
        racadm -r 192.168.8.14 -u root -p calvin sshpkauth -i svcacct -k 1 -p 0xfff -f dsa_2048.pub
  3. Click Generate, and move the mouse in the window as directed.

    After the key is created, you can modify the key comment field.

    You can also enter a passphrase to make the key secure. Ensure that you save the private key.

  4. You have two options for using the public key:
    • Save the public key to a file to upload later.
    • Copy and paste the text from the Public key for pasting window when adding the account using the text option.

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