this post was submitted on 22 Sep 2023
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41
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] 17 points 1 year ago (1 children)

You should be able to do wildcards with acme V2 and a dns challenge: https://community.letsencrypt.org/t/acme-v2-and-wildcard-certificate-support-is-live/55579

You would manage internal dns and would never need to expose anything as it’s all through validation through a TXT record.

You could use also something like traefik to manage the cert generation and reverse proxying:

https://doc.traefik.io/traefik/https/acme/