I'm using dydns to name my servers. My provider is using CGN, therefore my IPv4 is almost useless. Updating my IPv4 does not make any sense and I want to skip/deactivate this, I just want to update my IPv6 (e.g. after a prefix update). Is there a way to achieve/configure this with ddclient?
Assuming a sufficiently new Perl ddclient perhaps
Makes use of the OS interface command to find IPs, ip on Linux, others on other platforms.
My reading of the source is that it only does one address family, I think. Disabled v4 just in case. Per the template config file, IPv6 requires newer than 3.8.1.
Or, consider using a v6 only network for some hosts. Remove all (non-loopback) v4 addresses from interfaces. Implement transition methods like DNS64/NAT64 where required to connect to IPv4 hosts.