How to Fix “SSH Too Many Authentication Failures” Error


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Sometimes, while trying to connect to a server via SSH, you may encounter the error “Received disconnect from x.x.x.x port 22:2: Too many authentication failures.”

In my case, the system is Ubuntu and joined to Active Directory. I can only use domain users to access the server, with a mandatory long password when I often mistyped the password.

The server only gives me two times the opportunity to login correctly.

To get the number of failures a specific user has, I used this command.

pam_tally2 --user yourid

And to reset it used this.

pam_tally2 --user yourid --reset