If you go to https://ipinfo.io at home (over wifi or ethernet) and it says your ip is in the 100.64.0.0/10 range, then you are on a CG-NAT network.
This wikipedia article may be helpful. The short answer is that we are running out of public IPv4 addresses so CG-NAT is used so a bunch of users can essentially share 1 (or a few) public IPs. From the router’s perspective, you have a public IP that is actually a private IP in the 100.64.0.0/10 range.
However, not having a real public IP means you have no way for remote devices to directly access your router, so port forwarding won’t work.
How can I go about learning what any of this means and how to look for it?
If you go to https://ipinfo.io at home (over wifi or ethernet) and it says your ip is in the
100.64.0.0/10range, then you are on a CG-NAT network.This wikipedia article may be helpful. The short answer is that we are running out of public IPv4 addresses so CG-NAT is used so a bunch of users can essentially share 1 (or a few) public IPs. From the router’s perspective, you have a public IP that is actually a private IP in the 100.64.0.0/10 range.
However, not having a real public IP means you have no way for remote devices to directly access your router, so port forwarding won’t work.