I run in my terminal:
wget-ssl https://ipv4.dynv6.com/api/update?token=Gi&hostname=****01.dynv6.com
I got a log：
–2021-03-15 17:21:21-- https://ipv4.dynv6.com/api/update?token=Gi
Resolving ipv4.dynv6.com… 159.69.43.243, 95.216.144.82, 185.55.116.153, …
Connecting to ipv4.dynv6.com|159.69.43.243|:443… connected.
HTTP request sent, awaiting response… 404 Not Found
2021-03-15 17:21:26 ERROR 404: Not Found.
I can’t update my IPv4. I don’t know how to fix it.
You should be able to GET http://dynv6.com/api/update?hostname=<domain>&token=<username>&ipv4=<ipaddr>
Replace <domain> with your Zone,
replace <username> with the password in the ddclient section or the username in the fritzos section on the instructions page of your zone -> https://dynv6.com/zones/YOURZONENUMBER/instructions
I am not too sure whether you redacted your token, or if you actually used that Gi, might also be the ipv4. prefix
And last but not least, you might want to wrap your URL in quotes.
E.g. i just tested:
curl "http://dynv6.com/api/update?hostname=<domain>&token=<username>&ipv4=<ipaddr>"
and it worked