Any misspelling in the krb5.conf file might cause a failure when you add a host.

Problem

When you are adding a host, the Kerberos authentication is unable to reach a Key Distribution Center (KDC) for yourrealm.

Cannot get kdc for realm YOURREALM.COM

Cause

The libdefaults and realms sections in the krb5.conf file might be misspelled.

Results

Verify that the libdefaults and realms sections in your krb5.conf file are spelled correctly.