IP camera behind Carrier Grade NAT

[StarShaper]

Hi everyone!

I have a technical question regarding IP cameras from Dahua.

A friend of mine bought an IP camera and installed Dahua app on his phone.

He is using a provider, which uses Carrier Grade NAT. Since on a Carrier Grade NAT the IP address of the router is not public, it is usually not possible to connect to the router without a tunnel, like VPN.

However, he successfully connected to the IP camera with the help of a college.

How is it possible?

Does Dahua provide some kind of VPN Server as a service? Maybe with Dahua DDNS?

This can only work, if the camera is always connecting to a Dahua service, which then establishes the connection between the smart phone and the camera.

Or am I missing something?

 

[StarShaper]

Ok. I found an answer. Dahua offers a P2P cloud service, which acts as some kind off connection manager between the IP cam and the phone.

This way, even without a public WAN IP, it is possible to connect to the Dahua devices.

Nice service from Dahua.

As long as they offer it...

 

[Barboots]

As long as their service is secure

Some ISPs have implemented CG NAT as a stop-gap pending IPv6 deployment. Mine allowed me to opt out... I just had to advise that it affected my surveillance system, and the change was made in minutes.

Cheers, Steve