Anycast

02 Nov 2025
Debian 13 Anycast Node
Building Debian 13 anycast nodes from cloud images with cloud-init support: configuring multiple loopback addresses using netplan instead of /etc/network/interfaces, exabgp service configuration for anycast BGP route announcements, and deploying redundant anycasted DNS infrastructure.
14 Oct 2022
exabgp 4.x, anycast, and healthchecks
Implementing exabgp 4.x built-in healthchecks for anycasted DNS: configuring health check intervals, rise/fall thresholds, withdraw-on-down behavior for automatic route removal on service failure, and multi-address-family BGP sessions for IPv4/IPv6 anycast announcements.
06 Mar 2018
AS112 and BIRD
Implementing AS112 reverse DNS sinkhole using BIRD BGP daemon: installing kernel routes from BGP, configuring prefix filters for RFC1918/RFC6890 anycast addresses, and using arouteserver to automate IXP AS112 deployments with BIRD.
13 Feb 2018
AS112 and Exabgp
Deploying RFC1918/RFC6890 reverse DNS sinkhole with AS112 using exabgp: configuring anycasted 192.175.48.0/24 and 2620:4f:8000::/48 prefixes, implementing exabgp-healthcheck for DNS service monitoring, and advertising BLACKHOLE routes only when service is operational.
02 Feb 2017
HA Recursive DNS with dnsdist and exabgp
Building anycasted highly-available recursive DNS with dnsdist load balancers and exabgp: using BGP MED-based failover across 4 dnsdist nodes with PowerDNS recursor backends, custom orderedwrandom load balancing policy, and automated healthchecks for route withdrawal.
05 Jul 2014
ipquail now curl friendly
Adding CLI-friendly IP detection to ipquail.com: returns plain IPv4/IPv6 addresses when accessed via curl, with separate subdomains for protocol-specific queries and script integration.
01 Jul 2014
Anycast Administration with SaltStack
Automating git pulls across multiple anycast nodes using SaltStack: replacing manual SSH logins with a single salt master command that updates web directories simultaneously on all anycast instances.
27 Apr 2014
exabgp: first lab
Building an exabgp lab to explore route injection, anycast/HA services, route servers, and DDoS mitigation scenarios using Python-based BGP automation.
19 Jan 2014
IP Quail
Building IP Quail, an IPv4/IPv6 service to display client IP addresses. Deployed on HenchCDN with anycast distribution using SSI and Bootstrap for high performance and availability.
05 Oct 2013
I'm doing AnyCast!
Setting up anycast services using Bird OSPF to inject /32 and /128 routes across multiple locations. Using FreeBSD VMs for redundant IPv4/IPv6 anycast DNS and web services.