Hey, great post. I have one request. Can you maybe add some description for what the iptables entries do? I have a similar setup with a lot less iptables rules that works well for me. But I'm not an expert in networking, and am now worried that I might be missing something that can leak my home IP.
this post was submitted on 28 Oct 2024
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Thanks for the feed back. I started out with that post I referenced in my article, which had fewer entries. It didn't work. Caveat was although the online port checkers were reporting the port as open, it was not actually making through the tunnel!
I actually solved it by asking chatgpt!! I put in the suggestions and it worked. I'm also no expert on creating iptables, but once it was in place it seemed self explanatory.
I ran netcat as client-server to test it actually worked.
Thanks for the nice write-up, saving it in case I find myself behind CGNAT in the future.
another option is to use Cloudflare's tunnels. it's free, I use it all the time. really great.
I've set up some tunnels. Works nice but then the voices came. 'Why would you trust a company like Cloudflare with all your data?' 'Why rely on this one company for all your services?'
Nearly a year into my selfhosting journey and I'm more confused than ever.
tl;dr: classic convenience/privacy. depends on your threat model. surely better than Google. models of zero trust will help.
That's a great question, that I have asked myself before too. It doesn't have one answer, and any one would make their own choices based on their own respective threat model. I'll answer you with some of my thoughts, and why I do use their services.
I'll take as an example my usage of NextCloud, coming as a replacement to Google Drive for example.
let's break up the setups:
- client (mobile app, desktop client, browser)
- communication to server
- server
It's oversimplified, but to the point: In Google's setup, you have control of 0 out of three things.
- you use their closed source client, 2. they decide the communication to the server (if there's any CDN, where their servers located, TLS version), and 3. data is on their servers, wether encrypted or not is up to them.
In NextCloud's setup,
- The clients are open source (you can varify them, or build your own),
- communication to server is up to you. and in this case you trust your data with CF, that's right. gonna have to trust them.
- server is your server, and you encrypt the files how you want.
From just this look, NC is clearly better off. now, it's not perfect, and each one will do their own convenience vs privacy deal and decide their deal.
If you deploy some sort of e2ee, the severity level of CF drops even more, because they're exposed to less data. specifically for NC they do do e2ee, but each solution to its own. https://nextcloud.com/encryption/ this goes as an example for zero trust model. if you handle the encryption yourself (like using an e2ee service), you don't have to trust the medium your data is going through. like the open internet.
Yeah it's a popular choice for various things. But wouldn't it be against TOS using it for p2p and that amount of traffic?
gotta admit I haven't read the ToS, but I didn't encounter any problems. I'm streaming GBs of music via the tunnel and it still works. p2p I didn't try, but I don't really see a reason to?
Just remember that Cloudflare decrypts and re-encrypts all your data, so they can read absolutely everything that passes through those tunnels.
mind elaborating?
If I let them handle the TLS for me then I can see that. but if, for example, I'm using NextCloud, which implement end to end encryption from client to server, then I wouldn't care if they did, no?
Huh, good to know. I'm out remember some of us have traffic in the TBs pretty month!