How do I determine my FQDN?
If my /etc/hosts file contained my server's IP address, DNS name ("example.com"), and hostname ("diamond"), e.g.
192.168.1.1 example.com diamond
would my FQDN be "diamond.example.com"?
192.168.1.1 diamond.example.com diamond
Which means both diamond.example.com AND it's alias diamond resolves to 192.168.1.1
Use only your system mark in ddclient 192.168.1.1. So in the event that you have the system named as "Home" in your Dashboard, at that point the "hostname" in ddclient would be only that, "Home". I've tried ddclient with both my secret key cited and unquoted and had no issues. I would prescribe running "ddclient - troubleshoot - verbose - noquiet - power" and check the yield. It should let you know all that you have to know to make sense of what's happening. We don't do any definitive or dynamic DNS facilitating so there is no FQDN for you to point to or at.