Guide for Asuswrt-merlin users with screenshots (forcing all traffic to Pi-hole) : r/pihole
Enable port forwarding for ASUSWRT-Merlin - cFos Software
ASUSWRT | Unfinished Bitness
AsusWrt-Merlin Provides New Firmware for ASUS Routers - Version 380.59.0
OpenVPN on a Router with AsusWRT | Perfect Privacy
Amazon.com: ASUS AC1750 WiFi Router (RT-AC66U B1) - Dual Band Gigabit Wireless Internet Router, ASUSWRT, Gaming & Streaming, AiMesh Compatible, Included Lifetime Internet Security, Adaptive QoS, Parental Control : Electronics