Kerberos on AWS

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Kerberos on AWS

We have a Teradata system on AWS where we are trying to enable Kerberos authentication.  Ldap is working fine, but we are not able to get Kerberos to work.  When trying to connect using KRB5 in SQL Assistant, I am getting error "0:  Major Status=0xd0000 Minor Status=0x80090303-Failure".  I have been looking at the Security Administration guide, and all of the Kerberos installation and setup seems to be fine.  I've also compared to our on-prem system and everything matches up.  The CNAME and hostnames are registered in AD, and I can ping and issue an nslookup on all of the names from the AWS instances as well as my laptop.

 

Does anyone know if something special needs to be done setting up Kerberos with a Teradata instance in AWS?