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How to get local SSL and use your public domain for local internal subdomains? (lemmy.dbzer0.com)

submitted 3 days ago by ComradeMiao@lemmy.dbzer0.com to c/selfhosted@lemmy.world

29 comments fedilink hide all child comments

For instance how can I use my *.domain.com SSL certs and NPM to route containers to a subdomain without exposing them? The main domain is exposed.

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[–] digdilem@lemmy.ml 3 points 3 days ago

How we've done it recently:

Put domain on cloudflare or another registrar that supports an API. Generate a token with the right privs.
Use certbot with the cloudflare plugin, and that token, and generate whatever certs you need within that domain using the DNS01 method.

No need to have port 80 open to the world, no need for a reverse proxy, no need for NAT rules to point it to the right machine, no need to even have DNS set up for the hostname. All of that BS is removed.

The token proves your authentication and LetsEncrypt will generate the certs.