Open Source DDNS Server

Does anyone know of an open source DDNS server script that's compatible with Dahua DVRs; the idea being to host your own DDNS server.

Does anyone know of an open source DDNS server script that's compatible with Dahua DVRs; the idea being to host your own DDNS server.

Raspberry Pi can act as DDNS updater with no-ip for example

so for $ 30-40 u can have your own DDNS client

Raspberry Pi can act as DDNS updater with no-ip for example

so for $ 30-40 u can have your own DDNS client

Let me clarify. My DVR can update to no-ip fine on its own; I can even do that using a router if I wanted.

What I need is a known open source DDNS server script out there that is compatible with Dahua DVRs. That way I can host that script on my own server, and let the DVR update to that server. I'm trying to get around using a paid DDNS service, or a free one that requires me to update my info every 30 days.

I'm also trying to dodge using Dahua's DDNS service.