AD user login fails after Reboot on Red Hat Enterprise Linux server due to disabled SSSD service

Solution Verified - Updated -

Issue

  • After a RHEL 9 server reboot, Active Directory (AD) users are unable to log in. The error observed during SSH login is:
Permission denied, please try again.

System logs (/var/log/secure) show:

sshd[xxxx]: Invalid user <ad_user> from ::1
sshd[xxxx]: pam_unix(sshd:auth): user unknown
sshd[xxxx]: pam_unix(sshd:auth): authentication failure

Environment

  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8
  • SSSD
  • Active Directory

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