Aug 21, 2018 · Open 'gash' and create a working directory where you will save all your files. e.g. Code: $ cd c:/users/username/Documents/ $ mkdir x11sslf $ cd x11sslf. Using OpenSSL, create an RSA key - if prompted for passphrase, do not type any characters, just hit enter. Code: $ openssl genrsa -out private-key.pem. Certbot’s DNS plugins which can be used to automate obtaining a wildcard certificate from Let’s Encrypt’s ACMEv2 server now are not available in some official repository. IF you don’t want to wait, you can use these plugins now by use certbot from source. Get and prepare certbot v0.24.0 from source
To generate wildcard certificates, add an asterisk to the beginning of the domain(s) followed by a period. Wildcard certificates will also secure the root domain, so there is no need to re-enter the root domain in the process. For example, to create a wildcard domain for example.org, enter *.example.org.