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!

  • @[email protected]English
    24•8 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

    • lemmyvoreEnglish
      16•8 months ago

      Unfortunately IPv6 adoption is not universal. There will be parts of the internet that won’t be able to reach you at a 6-only address.

      • whoareuEnglish
        2•8 months ago

        Yup, my gemini capsule is suffering from it. :(

    • @[email protected]English
      1•8 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

        • @[email protected]English
          1•8 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?

          • @[email protected]English
            1•8 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::

            • @[email protected]English
              1•8 months ago

              I’d need to check it out, it’s been a while. But I tried pretty much all addresses that are printed out with “ip address” command on linux

      • @[email protected]English
        1•8 months ago

        wdym except Verizon? I have a whole section of /56 for me in ipv6, tho the Verizon website is ipv4 only

        • Encrypt-Keeper
          English
          1•8 months ago

          Verizon IPv6 rollout technically started but has been very limited in the last few years. I live outside one of the biggest cities in the U.S. and it hasn’t even made it here yet. In the last five years they’ve only made it to 50% of their userbase being capable.