I have a few domain names on no-ip.me . I used the inadyn client, available as part of my Linux distribution (Debian Stretch). /var/log/messages shows me that it's working (forced update every ~40,000 seconds).
Still, every once in a while I get an email warning me that a domain will expire unless I manually update it on the site.
Am I doing something wrong? Am I missing something? Or are no-ip.me just being abusive of their gratis users?
You're not doing anything wrong. The old trick used to be to temporarily change your host to a dummy IP and then change it back to a legitimate IP. This would cause the API to respond with "good" and you were set for another month (I even implemented this in my fork of AntonioCS's bash script). The trick doesn't work anymore and manual login and verification is now required.
No-IP basically treats unchanged IP's as a non-update. Even if you set it to send an update every 10 seconds, No-IP only considers it an update if the IP changes.
nochg IP_ADDRESS Success IP address is current, no update performed. Followed by a space and the IP address that it is currently set to.
As an aside: I tried to make a quick and dirty inadyn client that took my IP, added 0.0.0.1 to it (192.168.1.100 becomes 192.168.1.101), updated NoIP with that, waited 15 seconds, then send another update with my actual IP so that NoIP would see a changed IP and update - didn't have much success with it and gave up.
