Internal SSL Certs with Let's Encrypt

CodeProject [http://www.codeproject.com] I was reading a great article [https://medium.com/heck-the-packet/subdomain-enumeration-a-comparison-of-paid-services-c29cb071900f] recently about subdomain enumeration services and it got me thinking about Let's Encrypt and internal domains. It's common to run a split-domain setup where there's a single domain…