On Mon, Jun 22, 2015 at 03:01:33PM -0400, Frank Pikelner wrote:
Hello,
In my testing it would appear for Dynamic DNS to work (update DNS A and PTR records), the Linux client hostsname needs to be FQDN (client123.domain.com) defined as one of the hostnames in /etc/hosts for the 127.0.0.1 IP as:
[/etc/hosts]
127.0.0.1 client123.domain.com client123 localhost.local localhost 172.16.5.10 client123.domain.com client123
If I have something like, dynamic DNS does not appear to work:
[/etc/hosts]
127.0.0.1 localhost.local localhost 172.16.5.10 client123.domain.com client123
The second /etc/hosts file should be correct but dynamic DNS is not working. Is there something in the implementation that requires the first case, or should just the order of the /etc/hosts entries modified so that the localhost appears second in the list?
I think this is more of a SASL or kerberos issue that requires the forward and reverse records to match.
But yes, in general with Kerberos, especially not the most recent versions, you want the DNS records to match in both directions.