Hello, I have

authentication = kerberos

kerberos Realm = xxx

I ran tcpdump and know elogd server did attempt to contact kerberos server. I could run kinit username@realm_name, and klist shows my ticket fine. 

I receive "kerberos error 256: Decrypt integrity check failed. Please check your kerberos configuration" when I entered my password wrong purposely on login page.

I receive "Invalid user name or password!' when I entered my correct password. 

Please advise.