this post was submitted on 27 Oct 2023
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Is it worth the bother (or even possible) to encrypt LAN traffic with NGINX Proxy Manager? (alien.top)
submitted 1 year ago by CringeGinge666@alien.top to c/main@selfhosted.forum
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I set up Nginx Proxy Manager just for general local security, but I'm behind CGNAT so I use ZeroTier (which I'm happy with). I have a Pi with NPM and Adguard plugged into my router, and a bunch of other Docker containers and other self-hosted programs on my main machine. I set up my domain with cloudflare, so mydomain.com points to my local npm address, 192.168.x.x, used the wildcard letsencrypt ssl so i can access my stuff from jellyfin.mydomain.com, adguard.mydomain.com, etc, then set up NPM to point each subdomain to it's correct service, so 192.168.x.x:8096 => jellyfin.mydomain.com. I also setup adguard with wildcard DNS rewrites.

However, I used wireshark to check if all was well, but the traffic between my main machine and my pi is unencrypted. This makes sense in retrospect, but kind defeats the point of what I was going for, since I have not-so tech savvy family members, and having the password for stuff like guacamole just floating around the LAN in plain text is kind of off-putting. I figured I'll just centralise the more important services on the pi since it doesn't have the http issue, or maybe expose the docker socket of my main machine with tls enabled? If there's another way of doing things, or if I've missed something, I'd be grateful for any advice, but I'd rather not have to deal with self-signed certificates.

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[–] tenekev@alien.top 1 points 1 year ago

It's worth it. At some point you might enconter a service that requires SSL to work even on LAN. I treat them like pipes. The fewer pipes i need to pipe traffic through, the easier it is.

I use split DNS to access services locally, over the internet and via VPN. Everything is behind a Traefik proxy that uses wildcard certs. It enforces SSL for everything and I have just one pipe to think about.