We upgraded our LDAP/Kerberos servers to CentOS7. As a test we pointed a VM (that is configured to authenticate with ldap/kerberos) to new ldap/kerberos servers. However, we get system error 4 in /var/log/secur. Under the troubleshooting section of the site, we're asked to join this mailing list to figure out what is going on.

Also, we tried to point back to the existing ldap/kerberos servers on our test VM, we still get the system error 4. The new ldap/kerberos servers are identical to the old ones. Please, advice us on how we can proceed with troubleshooting this issue. Thank you.

-F