The UI needs a way to allow the end user to select if the IPV6 and/or IPV4 addresses will be checked. It's possible to put these options into the config file according to the link below. I specifically do not want to list a IPV6 address. I don't know if it would be a good idea to turn off IPV4, but might as well make it an option in the GUI too.
https://serverfault.com/questions/1084718/ddclient-do-not-update-ipv4-but-just-ipv6
Agree!
I just found this:
From Dynamic DNS service, go to the "General settings" tab.
Click the "advanced" toggle
There is a checkbox for "Allow IPv6".
Try it out!
I do not have this checked, but it does not put the "ipv6=no" into the config file. Is this a bug?