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  • Post the ssh -vvv debug output from one of the servers where this does work so we/you can compare the 2 outputs. Commented Nov 26, 2015 at 3:28
  • FYI the Jump server is always the same example. [email protected] the first debug is from the server that is not accepting the authentication.key the second output is a server that is taking the authentication key. Commented Nov 26, 2015 at 5:25
  • Are you certain that public key authentication is enabled in the sshd_config on the server that is giving you problems? Commented Nov 26, 2015 at 5:55
  • yes I am 100 % sure Commented Nov 27, 2015 at 18:22
  • Are there any obvious differences between the problem server and the others -- such as operating system, OS version, etc? Do a diff or Beyond Compare comparison of the sshd_config of the problem server and the sshd_config of a server where this is working as expected. That should shed some light on the situation. Also, kind of important -- what OS is the problem server running? Commented Nov 28, 2015 at 1:03