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How to properly setup local certificate authorities for sub domains? (lemmy.world)

submitted 9 months ago by [email protected] to c/[email protected]

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Hello everyone,

A bit of background on how things are configured: I have many local services and am in the process of setting up two local domains, namely local1.publick.com and local2.publick.com. I own the domain name publick.com and manage it through Cloudflare.

Local1 is for the Windows domain and is using Active Directory, while local2 is for the Linux domain and is using RHEL IDM.

Now, as I am also exploring Single Sign-On (SSO) with Keycloak and a few other things, I would like to properly set up SSL for all these subdomains. Can I configure two local certificate authorities? One for local1.public.com and another for local2.publick.com? I would then use these to create certificates for service.local1.publick.com and service.local2.publick.com. Since the AD domain controller and RHEL IDM controller are authoritative for these two domains, can I still integrate two CAs with this setup?

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[–] [email protected] 4 points 9 months ago (3 children)

Maybe use DNS challenge? https://notthebe.ee/blog/easy-ssl-in-homelab-dns01/

[–] [email protected] 2 points 9 months ago (2 children)

I am already using this for publick services i have things jellyfin.publick.com domains. Which works fine for that usecase. What I am looking for here is to make SSL work properly for services that are part of the 2 local domains. where the 2 controllers are authoritative of those 2 domains.

[–] [email protected] 1 points 9 months ago* (last edited 9 months ago)

Not sure if you use OPNSense, but the acme plugin allows you to automatically upload certificates (via ssh) to the appropriate servers whenever the certificates are updated.

One other way would be to use a reverse proxy internally (if you only need SSL for web interfaces).

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