If you are able to host a file on the domain at a specific location, then you can use Let's Encrypt for instance. Certbot uses ones ability to present a resour

If you are able to host a file on the domain at a specific location, then you can use Let's Encrypt for instance. Certbot uses ones ability to present a resource (aka acme-challenge) on the domain for issuing certs (either via http or dns txt record). More info: https://certbot.eff.org/docs/using.html#changing-a-certificate-s-domains https://certbot.eff.org/docs/using.html#changing-a-certifica...