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certificates
🛡️ A private certificate authority (X.509 & SSH) & ACME server for secure automated certificate management, so you can use TLS everywhere & SSO for SSH.
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If you want to use a ACME for your internal services you either need to purchase a domain and use LetsEncrypt's DNS-challange or create your own internal CA and use smallstep or something similar as an ACME server.
As others have said, you need to own a public domain in order to get a valid certificate. I try to help people get around this with a certificate on https://homelab.express/. It might work for your case.
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- Simplifying SSH one workstation to many servers
- Step-ca private CA and and ACME server