Algorithm negotiation fail SSH in Jenkins

Question

I\'m trying to ssh from Jenkins to a local server but the following error is thrown:

[SSH] Exception:Algorithm negotiation fail
    com.jcraft.jsch.JSchExcep         


        

Answer 1

Instead of fixing this on the server side, you can also update the client side. If you use http://maven.apache.org/wagon/wagon-providers/wagon-ssh/ in a newer version (>= 2.12 - current release as of Sep. 2018 is 3.2.0), this problem does not occur anymore.

  
  
    
      
        
          org.apache.maven.plugins
          maven-site-plugin
          3.6
          
            
              org.apache.maven.wagon
              wagon-ssh
              3.2.0
            
          
        
      
    
  
  

Update 2018-10-21: The latest version is now 3.2.0. Due to various vulnerability issues I'd advise to always use a current version of SSH- or SSL-related software anyway. So please check and update your dependencies in your code.