Tag: anycast

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Analysing ccTLD anycast

By Anurag Bhatia on 10 Oct 2025

Guest Post: How ccTLDs handle global traffic and DDoS risks.

Autocast: Automatic anycast site optimization

By Thijs van den Hout on 8 Oct 2025

Guest Post: Automatically selecting the optimal anycast locations for fast .nl response times worldwide.

DNS nameservers: Service performance and resilience

By Geoff Huston on 4 Feb 2025

How do we provision DNS nameservers today?

DNS nameservers

By Geoff Huston on 19 Dec 2024

How recursive resolvers handle DNS queries and how can administrators optimize nameservers for performance and resilience?

Mitigating DDoS using an anycast playbook

By A S M Rizvi on 28 Mar 2023

Guest Post: How to redistribute traffic between anycast sites during a DDoS attack.

Unpacking RFC 9199: Considerations for large authoritative server operators

By Giovane Moura on 4 Jul 2022

Guest Post: RFC 9199 presents considerations to improve the security, resilience, and performance for large authoritative DNS server operators.

Notes from DNS-OARC 36

By Geoff Huston on 7 Dec 2021

Slack’s DNSSEC debacle, NSEC problems, Measuring DNSSEC, and more from DNS-OARC 36.

AnyOpt: Predicting and optimizing IP anycast performance

By Xiao Zhang on 24 Nov 2021

Guest Post: New anycast technique reduces average RTT between clients and anycast servers by 43.4%.

Caching is key to interpreting root DNS anycast performance

By Thomas Koch on 26 Oct 2021

Guest Post: Context is everything when it comes to assessing anycast.

Did you validate your routing policies?

By Leandro Bertholdo on 22 Sep 2021

Guest Post: See 90% of all active ASes on the Internet with new anycast testbed.

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