• vividspecter@lemm.ee
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    11 months ago

    You might be on a CG-NAT network which makes port forwarding impossible. Some ISPs will disable it if you ask (or give you an ipv6 IP which isn’t affected by the issue).

      • vividspecter@lemm.ee
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        11 months ago

        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.