Building your own Router with a Raspberry Pi — Technically Wizardry
Running Pi-hole in a container on my Synology server to block ads everywhere in my home network on all devices | by Pieter Gheysens | Into ALM | Medium
How to Install Pi-Hole on Your Synology NAS – Marius Hosting
How I repurposed an old Raspberry Pi into a travel router | Digital Trends
How to Set Up Pi-hole on a Synology NAS in 2023
Update with guides and links, see comment) Pi zero for PiVPN & Pi-Hole; Pi 4 as torrent download station with PIA VPN mounted to Synology : r/raspberry_pi
Should you use Pi-Hole for blocking ads? (using a Raspberry Pi 4) – MBReviews
How-To] Blocking DNS Except Pi-holes on a Synology Router : r/pihole