...
Our testing shows that during such a setup getting a Kerberos ticket form AD will not work. So when testing Kerberos you will either have to configure this link between jira.example.com and IP in your DNS servers or in your local hosts file.
I am unable to log in with traditional login when I press “Log in again”. I am instead automatically logged in, and redirected to dashboard.
This situation occurs when Kerberos is configured and force login is enabled. To allow users to log in with traditional login, visit Kantega SSO → Common → Force Login. At the bottom of the page there is a section called “After login behavior”. Toggling this slider off should allow users to log in with username and password after pressing “Log in again”.
User Directories
How are Kerberos users mapped to accounts in User Directories?
...