SSH – Algorithm negotiation failed – Real Fix.


November 5, 2014 by aubreykloppers

After searching high-and-low for this fix, I finally found it’s fix…

HOW TO FIX “Algorithm negotiation failed”, the easy way:

when ssh to a system.  In my case it was vCenter 5.*

  • Use a different system or the console to drop to a shell.
  • Edit the “/etc/ssh/sshd_config file
  • Comment out the line reading “#Ciphers aes256-ctr,aes128-ctr” and “#MACs hmac-sha1
  • Restart your sshd service.

This removes the incompatible ssh Ciphers from your server.


One thought on “SSH – Algorithm negotiation failed – Real Fix.

  1. Touhid says:

    Thank you so much. This is very helpful and it works for me. 🙂


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