Using a script with cron I was able to update my IPv4 record fine a day ago but today with a new IP address I get the following error:
curl: (7) Failed to connect to ipv4.dynv6.com port 80: Connection refused
I tried the same using https://ipv4.dynv6.com
but the problem persists, only stating “… port 443: Connection refused”
Are some services down or did something change?
There was an issue with the rate limiting in the firewall rules, that has just been fixed.
Detailed explanation: We use nftables to limit concurrent connections and TCP/SYN packets. Every SYN packet leads to a new entry in a set to count the packets per IP address per minute. Without a timeout after a couple of days this set becomes too big and nftables rejects all packets. From now on the entries will be expired after 5 minutes.