This is a fair warning to everyone. I've done some test recently on my own websites and found out that based on the CPanel Addon domain you can now find out what is main domain hosted with that hosting account. This is very important & crucial information especially for all of the guys hosting PBN domains with https (now) on same hosting account. This is example of what I've got when I've added addondomain.com to one of my CPanel hosting accounts and then I've decided to put on https on both of them. I've added https on maindomain.com and that was good. All well. And today I've added addondomain.com on that very same hosting account, installed SSL, got all the green lights everything is funky now and I just wanted to check up on it with ssllabs.com and I was speechless. Personally I've always disliked that fact that main domain and addon domains are connected like: addondomain1.maindomain.com addondomain2.maindomain.com addondomain3.maindomain.com And now... I'm speechless. Just wanted to share this and give a heads up to all of you guys about this. This can not interlink all your domains. Just your 1 addon domain with Let's Encrypt to a main domain and not vice versa. But still... Leak is a leak.