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Over-engineered ad-blocking with Pi-hole & Keepalived
20 November 2025
Pi-hole is a popular caching DNS server used for blocking ads network wide. Keepalived allow servers to failover virtual IPs. Today I'll be configuring 3 Pi-hole servers with Keepalived so that no DNS IP ever goes down. While DNS is designed with failover in mind, some services and devices really don't play well with that.
