First of all, what is wildcard DNS and why should you care? Well, you know when you go to the local DNS settings of your Pi-hole interface and you add an entry for a new domain? Let’s say you just spun up a Jellyfin instance so you add jellyfin.yourdomain. You would then need to create an entry in your reverse proxy, then another one in Pi-hole’s local DNS list. Well, imagine if instead we could create only one DNS entry so that every subdomain of a given domain point to the same IP.