this post was submitted on 11 Nov 2023
104 points (92.6% liked)

Selfhosted

39435 readers
6 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

  1. Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.

  2. No spam posting.

  3. Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.

  4. Don't duplicate the full text of your blog or github here. Just post the link for folks to click.

  5. Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).

  6. No trolling.

Resources:

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 2 years ago
MODERATORS
104
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
 

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!

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 0 points 1 year ago (1 children)

No it doesn't. It means you have access to the internet through that company's infrastructure. You still have full access to the internet behind a CGNAT even if you can't be reached directly from the internet.

[–] [email protected] 0 points 1 year ago* (last edited 1 year ago) (1 children)

An internet connection by definition is two-way. The internet was designed as a network of interconnected computers. A one-way only connection like through a CGNAT is preventing you from doing a lot of things the internet was designed for.

[–] [email protected] 0 points 1 year ago (1 children)

You have a 2 way connection as facilitated by the CGNAT gateway that routes responses back to your network.

[–] [email protected] 0 points 1 year ago (1 children)

If you have no unique public IP there are a lot of things you can't do, so it isn't a true two way connection.

[–] [email protected] 0 points 1 year ago (1 children)

No, it just doesn't fit in your imagination, but it is a 2 way connection by definition. It's also everything the ISP promises when they give you an internet connection.

[–] [email protected] 1 points 1 year ago (1 children)

Sorry, but you are using a wrong definition of an internet connection. A internet connection has by definition a unique public IP, otherwise it is only a intranet connection. That has nothing to do with my imagination and I can assure you that I would never pay for a CGNAT connection as most of what I do with my internet connection is not possible with that crap.

[–] [email protected] 0 points 1 year ago (1 children)

Your definition does not make it the definition. Nobody really cares about your definitions or what you would do with it. People care about the accepted definitions and what is the expectation.

[–] [email protected] 0 points 1 year ago (1 children)

That's like saying internet is not internet. And I very much expect my internet connection to have a public IP.

[–] [email protected] 0 points 1 year ago (1 children)

No, I'm just saying you're wrong at this point. You just keep proving that to be true with every reply.

[–] [email protected] 0 points 1 year ago (1 children)

So I am wrong for saying water is water and not fire?

[–] [email protected] 0 points 1 year ago (1 children)

Except you keep claiming it's fire. It's not fire, so stop calling it such.

[–] [email protected] 0 points 1 year ago (1 children)

You are extremly confused, sorry to say. Please look up the difference between "Internet" and "Intranet".

[–] [email protected] 0 points 1 year ago (1 children)

No, I don't think I am. You're just wrong and don't want to admit it. Some self reflection will do you good.

[–] [email protected] 0 points 1 year ago (1 children)

There is nothing to admit. You are simply not willing to concede that the original definition of "internet" is still valid and watering that down serves no purpose other that muddling the waters and allowing huge corporations to increase their profits by cheating on their customers.

[–] [email protected] 0 points 1 year ago (1 children)

See above comment for reply then sprinkle a bit of irony for the projection coming from you.

[–] [email protected] 0 points 1 year ago (1 children)

Well, if you insist on stanning for multi billion dollar companies that are cheating on their customers then I guess all we can do is to disagree.

[–] [email protected] 0 points 1 year ago (1 children)

No, just disagreeing the bullshit of a clueless internet stranger.

[–] [email protected] 0 points 1 year ago (1 children)
[–] [email protected] 0 points 1 year ago (1 children)

Yeah, but you really don't need to be an ass and flaunt it everywhere.

[–] [email protected] 0 points 1 year ago

You started with the impolite language...