Let's Encrypt Wildcard Certs
Recently Let’s Encrypt announced that they would be supporting wildcard certs. I was pretty excited to hear about this as many times I would like to get certs for machines that might not be accessible on the internet. Currently I didn’t see an easy way to do this. With the new certs you could get a cert on your web server for your domain and use that cert on all the other machines in your domain that need TLS as well.