Had a client that was having issues keeping their IP address updated with their office NVR. Side note, a static IP would have been easier.

With their HikVision DS-76xx box using NO-IP, we could not get the system to connect to the NO-IP host to update. Settings are:

We re-entered the username, the server address, the password, the domain, all without any success. Kept seeing: “connect to server failed”. The problem? Password was too long. I preach password security, but by shortening the password we were able to get it working. We had to change password to the account on NO-IP.com first, the NVR second, and a quick reboot and we were back up and running.