Tuesday, August 16, 2016

Algorithm negotiation failed for SSH Secure Shell Client

If you are using the dated SSH Secure Shell Client 3.2.9, you may have issue connect to the more updated OpenSSH Server.

If you cannot change the client (which is recommended), you will have to update the OpenSSH Server on Linux. Add this in
# vim /etc/ssh/sshd_config

# Ciphers
Ciphers aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,arcfour
KexAlgorithms diffie-hellman-group1-sha1
*If you are using Centrify-OpenSSH, you have to modify /etc/centrifydc/ssh/sshd_config and do the same

  1. Bug 1228013 - Server responded "Algorithm negotiation failed"  

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