The manpage for gives an example and, I believe, the standard contains a commented example.
On open SUSE setting the DHCP hostname in the interface settings doesn't seem to work you need to use the send host-name "hostname" feature of but beware that hostname should not be fully qualified as the example suggests.
Luckily for us, there's a tool that'll do that for us. No, you shouldn't use that key for your server ;) The last token in that file is the key (N8Hk...). nsupdate is the tool we'll be using to test if we have setup the server correctly.
Working client systems: Obviously the Windows domain workstations send the appropriate response to the DHCP server to trigger dynamic DNS update.
Our Linux domain clients (Ubuntu 14.04 and Cent OS 6/7) also send the appropriate response to the Windows DHCP Server.
Experiments: The Free NAS GUI has a section to setup interfaces. I noticed that there is an “Options:” field but no comments on what this can be used for.
I've tried a number of entries in this box but none seem to work.
Nor do entries in the “Options:” field propagate to /etc/