I’m connected via a 4G modem. Got this setup about 3 years ago. In the beginning it was enough to look for the public IP (what’s my IP). The modem showed some sort of private ip in the ui. I’m running stuff at home (Homeassistant, Gitea,) and bought a domain and pointed it to my home IP via Cloudflare. After some time I’ve noticed my modem shows the public IP also internally. For about 2 years now it ran flawlessly, the IP changed from time to time, but not really more than once in several weeks. For about a week all stopped working and the modem shows IP 100.xxxx and outside 85.something I guess I’m behind NAT now. Normal port forwarding on the modem is useless now. Is it possible to open the ports via UPNP? I’ve tried via miniupnp from my Ubuntu server, but it just throws an error.

upnpc -a ifconfig enp1s0| grep "inet addr" | cut -d : -f 2 | cut -d " " -f 1 22 22 TCP

Can I use this to somehow open the ports via UPNP on my modem and bypass the blocking? I can’t even OpenVPN to my modem anymore.

EDIT: i also run AdguardHome, that I use as Private DNS on my Android phone

UPDATE: everything except Adguard Home used as Private DND on my Android works! I’ve used this: https://github.com/mochman/Bypass_CGNAT/wiki/Oracle-Cloud-(Automatic-Installer-Script) - free Oracle VPS + automated well described script. Even HTTPS works fine!

  • DoomBot5@lemmy.worldEnglish
    0·
    10 months ago

    Could always see if they offer a static IP. My ISP uses CG NAT and I just pay $10/month for a public static ip to bypass it.

    • poVoq@slrpnk.netEnglish
      0·
      10 months ago

      And if not I would cancle the contract with them as CGNAT is not an internet connection and you should not just accept this break of contract.

      • Schmeckinger@feddit.deEnglish
        0·
        10 months ago

        Good luck getting a non CGNAT connection here without paying for it. Also it’s not a breach of contract if it’s not in the contract…

        • poVoq@slrpnk.netEnglish
          0·
          10 months ago

          If they sell an “internet connection” then selling one behind a CGNAT is a breach of contract, because it is not a connection to the internet but only a selective forwarding service from within their intranet.

          Similar to how the consumer protection agencies fought against fake speed promises and hidden “fair use” volume clauses, CGNAT should also be forbidden to be advertised as “internet”.

          • Schmeckinger@feddit.deEnglish
            0·
            10 months ago

            We have more internet connections than IPv4’s they can’t just pull new ones out of their ass. Also IPv6 is internet too.

            • poVoq@slrpnk.netEnglish
              0·
              10 months ago

              This is a myth. There are large swath of IPv4 address spaces totally unused and many ISPs hoard them without actually using them.

              An IPv6 only internet connection would also still be miles better than CGNAT connection.

              • Schmeckinger@feddit.deEnglish
                0·
                10 months ago

                How? You can literally turn IPv4 off on your whole network, or selectively by device. But if you turn off your IPv4 you will get cut off of a good chunk of the internet.

                And the only reason we have unused IPv4’s is because a big part of the internet is behind NAT of some kind like CGNAT.

                • poVoq@slrpnk.netEnglish
                  0·
                  10 months ago

                  There is nothing wrong with an organization sharing an single IPv4 internally via NAT, but if your ISP sells you a connection to the internet, this by definition means you get a unique public IP address, otherwise it isn’t an internet connection.

                  IPv6 support could be better for sure, but it is still much better than not having an internet connection at all as in the case of a CGNAT.

  • clericc@feddit.deEnglish
    0·
    10 months ago

    i’ve been on CGNAT and just pointed my domain to my ipv6 address with no issues - every isp should hand out huge v6 subnets dedicated to you.

    Since my v6 prefix is not stable, i use ddclient from my homeserver to update my domains AAAA record

    • baldissara@lemmy.worldEnglish
      0·
      10 months ago

      I tried that and couldn’t make it work. My server was unable to receive any http requests. Then I tried doing some tweaking in my ISP router configuration but with no success. So far cloudflare tunnel was the only solution I found

        • baldissara@lemmy.worldEnglish
          0·
          10 months ago

          Yeah I set it up to forward 80:80 and 443:443 but it didn’t seem to have any effect. Does port forward work on ipv6 the same way it does on ipv4?

          • clericc@feddit.deEnglish
            0·
            10 months ago

            in m limited sample size of one avm fritz.box, yes. What ivp6 address did you use to try and connect? a device typically has multiple - i.e. dont use fd00::, fe80::

  • plague-sapiens@lemmy.worldEnglish
    0·
    10 months ago

    Buy a cheap VPS, setup a Wireguard or OpenVPN server (wg-easy is quite nice). Then something like Nginx Proxy Manager or plain nginx and expose your services over that.

    Edit: if you need help, hit me up, love sharing my knowledge

    • Revv@lemmy.blahaj.zoneEnglish
      0·
      10 months ago

      I second this. I use a couple of dirt cheap VPSs from racknerd ($24/yr for 1 CPU/512Mb ram, but you can find coupons online to get them for $10/yr 1CPU/768mb ram) one does port forwarding over wireguard to my mail server so I can keep all my data in house, the other hosts an NGINX reverse proxy for all my web services. Works great. I use the reverse proxy for nextcloud and jellyfin for myself and 6 other users. Never had an issue. (Well, never had an issue I didn’t cause myself at any rate.)

      It’s a little harder to set up than some of the other suggestions, but it’s cheap, fully transparent to users, and doesn’t expose your home network to the outside world.