Cannot authenticate to Active Directory using pam_krb5 and receive the error: 'host/server.example.com@EXAMPLE.COM': Server not found in Kerberos database

Solution Verified - Updated -

Issue

  • After installing the krb5.keytab the system does not allow me to login. I get the following on message in the /var/log/secure file.
<date> server sshd[<pid>]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=x.x.x.x  user=username
<date> server sshd[<pid>]: pam_krb5[<pid>]: TGT failed verification using keytab and key for 'host/server.example.com@EXAMPLE.COM': Server not found in Kerberos database
<date> server sshd[<pid>]: pam_krb5[<pid>]: authentication fails for 'username' (username@EXAMPLE.COM): Authentication failure (Success)
  • We are trying to authenticate against an Active Directory server using pam_krb5

Environment

  • Active Directory
  • Red Hat Enterprise Linux

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