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    Looks like something is responding on port 22, but either it isn't an SSH server or there's a firewall that blocks the connection after seeing the content of the first packets. Are you actually running an SSH server on port 22? What is your firewall configuration? What have you changed from the default SSH and networking configurations? Commented Feb 10, 2018 at 9:00
  • Check in your sshd config (/etc/ssh/sshd_config) for any authentication-related configuration, and allowed users: some of this is preventing your authentication. Commented Feb 10, 2018 at 9:01
  • Welcome to this community. Please also take the tour. Commented Feb 10, 2018 at 10:16
  • @InterestingDroplet, Have you found any solution for this? Commented Aug 10, 2018 at 19:21
  • Potentially, there is some wrong in the /etc/ssh/sshd_config. Although I did not modify anything in the file /etc/ssh/sshd_config. @pkgajulapalli Commented Aug 12, 2018 at 12:38