Restrict SSH logins to specific hosts, users or groups

Solution Verified - Updated -

Issue

  • How to configure SSH to permit root login only from specific host or IP address?
  • How to configure SSH to permit login only for specific users and/or groups?
  • How to restrict password based logins only to certain users and/or hosts?

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • openssh-server

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