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Authentication by ssh key failed

How to solve Authentication by SSH key failed in Ezeelogin?


Overview: This article helps in resolving the "Authentication by SSH key failed/Authentication by password failed" error that occurs in the backend(ezsh) when logging into a remote server.


Step 1: Make sure that you can manually SSH to the remote server from the Ezeelogin gateway server. 

root@gateway:~# ssh user@remoteserver_ip or hostname

Step 2: Verify the password has been entered correctly from Ezeelogin GUI and backend(ezsh). Refer below screenshots.

Step 2(A): To view password from backend(ezsh), ssh into the jump server, select the server whose password needs to be viewed, and press the tab key.

Step 3: While adding the server using a key, Make sure that the key is correct and does not contain any strange characters or space while copy-pasting.

Step 4: Check the error log of the remote server to which you are trying to login.

For Centos:
root@remote_server:~# /var/log/secure


For Ubuntu:

root@remote_server:~# /var/log/auth.log

For other OS:

root@remote_server:~# journalctl -u sshd     or      journalctl -u ssh

Step 5: Check if password and key based auth enabled in remote server.

root@remote_server:~# sshd -T | grep -i 'PubkeyAuthentication\|PasswordAuthentication'

pubkeyauthentication yes
passwordauthentication yes

Solution: If password or key based authentication is not enabled, enable it on the remote server to resolve the issue.

Step 6: Check if specific user or user group if allowed in sshd_config file.

root@remote_server:~# sshd -T | grep -i 'AllowUsers\|AllowGroups'

allowusers root
allowusers alex
allowgroups ezuser

Solution: Add the username or user group to the SSHD configuration file if it is not already allowed to resolve the issue.

Step 7: Check the error logs 


Related Articles:

Error: Server login failed. Authentication by SSH key failed!. Remote Error: (1) if: Expression Syntax..

Authentication by key or password not supported