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Feature #842

Key-Based Authentication with OpenSSH

Added by Daniel Curtis almost 4 years ago. Updated almost 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Category:
SSH Server
Target version:
Start date:
08/21/2016
Due date:
% Done:

100%

Estimated time:
0.50 h
Spent time:

Description

This is a short guide on setting up OpenSSH to use only key-based authentication on FreeBSD 10.3.

Prepare the Environment

  • Make sure the system is up to date:
    pkg update && pkg upgrade
    

Prepare the Client

  • Change into the non-root user:
    su - bob
    
  • Create a SSH key pair:
    ssh-keygen -t ed25519
    
  • Copy the SSH key to the remote SSH server:
    ssh-copy-id bob@ssh.example.com
    
    • (Optional) If the ssh-copy-id command does not exist on the client machine, run the following to use ssh only:
      cat ~/.ssh/id_ed25519.pub | ssh bob@ssh.example.com "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys" 
      

Prepare the Server

  • ssh into the remote server:
    ssh bob@ssh.example.com
    
  • Edit the sshd config:
    sudo vi /etc/ssh/sshd_config
    
    • And modify the following values:
      PasswordAuthentication no
      ChallengeResponseAuthentication no
      
  • Restart the ssh server to apply the changes:
    service sshd restart
    

Resources

History

#1 Updated by Daniel Curtis almost 4 years ago

  • Status changed from New to Resolved
  • % Done changed from 0 to 100

#2 Updated by Daniel Curtis almost 4 years ago

  • Status changed from Resolved to Closed

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