https://www.pistack.xyz/tags/bird/ Recent content in Bird on Pi Stack Hugo en-us Sat, 16 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-16-self-hosted-dns-anycast-health-checking-bird-keepalived-guide/ Sat, 16 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-16-self-hosted-dns-anycast-health-checking-bird-keepalived-guide/ <p>DNS Anycast is the standard approach for running highly available, geographically distributed DNS services. By advertising the same IP address from multiple locations via BGP, clients are automatically routed to the nearest available DNS server. But what happens when one of those servers goes down? Without health checking, BGP continues advertising the anycast IP from a failed node, sending queries into a black hole.</p>