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ISP put me behind NAT (lemmy.world)

submitted 2 years ago* (last edited 2 years ago) by kokesh@lemmy.world to c/selfhosted@lemmy.world

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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!

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[–] plague_sapiens@lemmy.world 2 points 2 years ago

Exactly the same in many parts of DE. In Bavaria we have cable (docsis 3+) from Vodafone and then there's copper and fibre from Telekom (most other ISPs use their infrastructure). Depending on where you are in Germany, cables is provided by another company. There are some fibre companies too.

I'm currently moving from Nuremburg to a smaller town next to it. Currently I have 250/50Mbit/s and in the street I'm moving I can only utilize 100/40... Like wtf, 100m down the road there's the citiy hall, they have fibre and it's street to the next small city will get fibre next year. I won't until idk years. C'mon I would pay a shitton to get synchronous 1 Gbit/s. I'm gonna test 5G there too and maybe for my high bandwidth stuff that's an option. Still fucked up. It's 2023 an we still live in the stoneage of the internet. Fuck our politicians...