A large number of cameras via VPN, what is the bandwidth?

Question

VPN

Hello, the question is as follows, there are about 10,000 IP cameras, they are located on different network segments that do not even belong to us (from other contractors). Remote access to the camera is required, the most reasonable is a VPN connection from the camera to the server, how good should the bandwidth be to withstand such a number of connections? It is not necessary to spin all the traffic, you just need to go to the web face of a particular camera and configure it or change the firmware. And what else should be considered with such a volume of devices?

Answer 1

It is not necessary to turn all the traffic, you just need to go to the web face of a particular camera

You answered your own question. If you view/record a picture from the camera - there is traffic, if you do not view or record - there is no traffic. How thick traffic is in the settings of each camera.
It if in the first approximation. But there is a nuance. Some camera owners do not care, and they have not disabled the transmission of images to the Chinese cloud (which is often not even protected, see who wants; but I deviated from the topic). And we also need to see if it turns out that the cameras will upload pictures to Chinese clouds through your VPN. But you can use a firewall to stop them from doing so.

And what else should be considered with such a volume of devices?

If there are 10,000 VPN connections, then your device needs a fairly powerful processor. For example, a PC as a VPN server.

Answer 2

1. The device must have a sufficiently powerful processor and a decent amount of memory.
2. The channel will depend on the vpn type and camera settings, there may be routing problems, cameras can wrap all traffic into the tunnel by default. The channel width will have to be set experimentally on a pilot project.
3. You need legal advice, it is possible that you cannot use arbitrary equipment and vpn built into cameras in general, but must use hardware and encryption certified by various services.

Answer 3

Even 512kb is enough to open the web interface...
Then everything depends on the number of simultaneous requests.
By default, cameras should use their own gateway, and not the gateway in VPN, otherwise you will go broke
Well, it’s better to build a server for VPN based on a PC, the same openVPN on Linux, for example