this post was submitted on 22 Sep 2023
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42
Certificate management (lemmy.ca)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
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How are y'all managing internal network certificates?

At any point in time, I have between 2-10 services, often running on a network behind an nginx reverse proxy, with some variation in certificates, none ideal. Here's what I've done in the past:

  • setup a CLI CA using openssl
    • somewhat works, but importing CAs into phones was a hassle.
  • self sign single cert per service
    • works, very kludgy, very easy
  • expose http port only on lo interface for sensitive services (e.g. pihole admin), ssh local tunnel when needed

I see easy-RSA seems to be more user friendly these days, but haven't tried it yet.

I'm tempted to try this setup for my local LAN facing (as exposed to tunnel only, such as pihole) services:

  • Get letsencrypt cert for single public DNS domain (e.g. lan.mydomain.org).. not sure about wildcard cert.
  • use letsencrypt on nginx reverse proxy, expose various services as suburls (e.g. lan.mydomain.org/nextcloud)

Curious what y'all do and if I'm missing anything basic.

I have no intention of exposing these outside my local network, and prefer as less client side changes as possible.

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[–] [email protected] 2 points 1 year ago

I run freeipa internally, which handles all internal https certs (as well as nice things like handling non sudo auth so I can just ssh to machines from an already authed machine without a PW prompt, and doing ldaps for internal things that support it)

For external web, I have a single box running nginx as a reverse proxy thats web exposed. That nginx box has letsencrypt certs for the public web stuff. The nginx rp has the internal CA on it and will validate the internal https certs (no mullet SSL here!)

I also do different domains for internal vs external, but thats not a requirement for a setup like this