[Feature Request] DDNS server support

[savemyram]

Any possibility of hosting an IP detection service, that could dynamically detect and register the WAN IP in a locally hosted zone? I'm thinking along the lines of the server talking out, asking what's my external IP and using the response to update the request record in the zone. I see dynamic updating is already a feature, so it would be cool to be able to do this if not possible already.

[ShreyasZare]

Thanks for the request. Please explain the scenario in a bit details so that I can understand it better. Like since the zone is locally running on a private network, what will be use-case of having the WAN IP configured in a local zone record? Is this zone also publicly accessible?

[savemyram]

That's correct, the server could have a DDNS server component and update particular records. To do this though, we would need some kind of listener hosted on the technitium.com domain to respond to the request for the external IP. This would work whether the server was directly reachable or behind NAT. The use case I'm thinking of is for dynamic VPN tunnels with DHCP addresses, but instead of relying on a publicly hosted service it would be possible to host our own. Is there any API support where something like this is also possible using the existing public DDNS services?

[savemyram]

@Hemsby Thanks for the additional information. I was playing around with using the nslookup on Windows and was able to come up with something that does work, but thought there might be a cleaner way to do it using the API for everything.

[Hemsby]

I was being lazy at the time, I will update my script to use the API and share it with you.

[savemyram]

Yeah, I was playing around with basic batch scripts. I tried using the earlier PS one you posted, but I'm still running W7 and based on some little research, it looks like it might work if I install a newer version of Powershell. Just like you, I was feeling too lazy to do that at the time. :P
Thanks for being willing to share what you can offer. :)

[ShreyasZare]

Alternative is to just keep overwriting the A record periodically without checking if the IP had really changed. Practically, it wont really matter if you keep updating the same IP every minute. The end result will be the same.

[savemyram]

Yeah, I guess I was trying to replicate DDNS, but that's a little different as it's executing when the interface IP change happens.