Philippe Mathon: "Because this is all web-based, you don't have to physically close to the camera either - in principle you could operate it from a different continent."
Really? It has a public ip? v4 or v6?
The knowledge of IP seems to be quite limited.
Devices typically use DHCP, so IP addresses get assigned dynamically, optionally dependent on the MAC address. The dynamically assigned IP could be RFC1918 (private) or public.
Even private IP addresses can be accessed worldwide, if desired, by using NAT, tunneling, proxying etc.
Especially the idea of one poster is funny: devices are not shipped with preassigned IP addresses. Since IPs, netmask and gateway must match the network they are being used on. Routing needs to be considered.
And yes, IPv6 solves the problem of limited address space. Asigning IPs to every thinkable device is no longer a problem as far as available IPs are concerned.
Does that help?