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?
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If your ISP is using CGN, then you have a residential network, and your residential terms of service forbid running services to the public Internet. You need to get a business account.– Ron MaupinCommented Nov 28, 2021 at 1:18
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1 Answer
Assuming a sufficiently new Perl ddclient perhaps
use=if
ipv6=yes
ipv4=no
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.
answered Nov 28, 2021 at 0:23
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usev6=ipyieldsDEBUG: get_ipv6: using ip, ip reports <undefined>. I triedusev6=web, web=checkipv6.dyndns.com, web-skip='IP Address'and the website shows the correct IPv6, but the debug output saysDEBUG: get_ipv6: using web, checkipv6.dyndns.com reports <undefined>.– Thomas PCommented Nov 30, 2021 at 20:48 -
My mistake, ip method is static IP, as in command line option. if is probably what you want, if getting the IP of a Linux box. See edit. Commented Dec 1, 2021 at 0:29
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With a tiny modification to
usev6=if, if=enx...the edit fixed it for me. Thank you.– Thomas PCommented Dec 1, 2021 at 5:09