You can use DNS-01 challenge [1] to get certificate. You just need to add temporary TXT record to your DNS. It also supports wildcart certificates.
Most popular DNS providers (like Cloudflare) has API, so it can be easily automated.
I'm using it in my local network: I have publicly available domain for it (intranet.domain.com) and I don't wont to expose my local services to the world to issue certificate trusted by root CA on all my devices. So, this method allows me to issue valid Let's encrypt wildcard cert (*.intranet.domain.com) for all my internal services without opening any ports to the world.
Most popular DNS providers (like Cloudflare) has API, so it can be easily automated.
I'm using it in my local network: I have publicly available domain for it (intranet.domain.com) and I don't wont to expose my local services to the world to issue certificate trusted by root CA on all my devices. So, this method allows me to issue valid Let's encrypt wildcard cert (*.intranet.domain.com) for all my internal services without opening any ports to the world.
[1]: https://letsencrypt.org/docs/challenge-types/#dns-01-challen...