Measuring DNS root servers under change
Guest Post: Root server co-location is prevalent but mostly low, with ∼70% of vantage points observing co-location of at least two servers globally.
Tag: DNS
Event Wrap: OARC 44
Geoff Huston presented on ‘Authoritative Nameserver Selection and Recursive Resolvers’ at OARC 44 held online and in person in Atlanta, Georgia on 6 and 7 February 2025.
Preparing for Encrypted Client Hello (ECH)
Guest Post: How we defend our systems has shifted. Here’s what organizations and schools need to know.
[Podcast] How many DNS nameservers is enough?
Geoff Huston examines the number of nameservers assigned to domains and the potentially inefficient methods used to select which one is queried.
The DNS root server system gets surprisingly few queries
Guest Post: Understanding the root server system.
DNS nameservers: Service performance and resilience
How do we provision DNS nameservers today?
Impact of scanning on authoritative nameservers
Guest Post: Investigating the risks of DNS scanning for the DNS infrastructure.
[Podcast] RISKY BIZ-ness
Gautam Akiwate discusses his prize-winning paper on risks in the DNS supply chain.
Three of the best: George Michaelson
In 2024, George Michaelson touched on topics ranging from news to explainers. Here are three of George’s best.
DNS nameservers
How recursive resolvers handle DNS queries and how can administrators optimize nameservers for performance and resilience?