What is Split DNS & Why Should You Use It?

I've spent a while recently migrating my personal infrastructure off [Coolify](https://coolify.io). [Coolify](https://coolify.io)'s an excellent tool and one that helped manage the initial learning curve of managing and deploying things when I started to self host things. As I got more comfortable with the process, issues and details I found myself wanting to remove it as an abstraction on top of what I had become comfortable managing.

I used split DNS and Let’s Encrypt to have a valid SSL certificate for my Synology NAS, without opening any incoming ports in the firewall.