# APNIC Labs

Published articles for APNIC Labs.

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## \[Podcast\] 'Just say no' isn't as simple as you think

DevFeed: [\[Podcast\] 'Just say no' isn't as simple as you think](<https://devfeed.tech/articles/podcast-just-say-no-isn-t-as-simple-as-you-think-34924.md>)

Original publisher: [Read original article](<https://blog.apnic.net/2026/09/17/podcast-just-say-no-isnt-as-simple-as-you-think/>)

Author: George Michaelson

Published: 2026-09-16T23:23:11Z

Content type: article

Language: en

Sources: [APNIC Blog](<https://devfeed.tech/sources/apnic-blog.md>)

Topics: [APNIC Labs](<https://devfeed.tech/topics/apnic-labs.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [Server](<https://devfeed.tech/topics/server.md>)

Tags: [apnic-labs](<https://devfeed.tech/tags/apnic-labs.md>), [dns](<https://devfeed.tech/tags/dns.md>), [measurement](<https://devfeed.tech/tags/measurement.md>), [podcast](<https://devfeed.tech/tags/podcast.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [tech-matters](<https://devfeed.tech/tags/tech-matters.md>)

### AI overview

A PING podcast episode continues a discussion of surplus DNS queries observed in an APNIC Labs experiment. It examines how different ways of answering negatively affect query volume and the work required by servers, resolvers, and clients, and considers whether maintaining transport protocol state could reduce repeated-query work.

### Source excerpt

A continuation of the discussion on surplus DNS queries seen at APNIC Labs, the implications of how you say 'no', and the transport used for the DNS

## What part of 'No!' is so hard for the DNS understand?

DevFeed: [What part of 'No!' is so hard for the DNS understand?](<https://devfeed.tech/articles/what-part-of-no-is-so-hard-for-the-dns-understand-10859.md>)

Original publisher: [Read original article](<https://blog.apnic.net/2026/09/04/what-part-of-no-is-so-hard-for-the-dns-understand/>)

Author: Geoff Huston

Published: 2026-09-04T01:06:30Z

Content type: article

Language: en

Sources: [APNIC Blog](<https://devfeed.tech/sources/apnic-blog.md>)

Topics: [servers](<https://devfeed.tech/topics/servers.md>), [Caching](<https://devfeed.tech/topics/caching.md>), [DDoS](<https://devfeed.tech/topics/ddos.md>), [Cybercrime](<https://devfeed.tech/topics/cybercrime.md>), [Availability](<https://devfeed.tech/topics/availability.md>), [Bot](<https://devfeed.tech/topics/bot.md>), [Script](<https://devfeed.tech/topics/script.md>)

Tags: [apnic-labs](<https://devfeed.tech/tags/apnic-labs.md>), [attacks](<https://devfeed.tech/tags/attacks.md>), [availability](<https://devfeed.tech/tags/availability.md>), [bots](<https://devfeed.tech/tags/bots.md>), [caching](<https://devfeed.tech/tags/caching.md>), [ddos](<https://devfeed.tech/tags/ddos.md>), [dns](<https://devfeed.tech/tags/dns.md>), [generate](<https://devfeed.tech/tags/generate.md>), [measurement](<https://devfeed.tech/tags/measurement.md>), [random](<https://devfeed.tech/tags/random.md>), [server](<https://devfeed.tech/tags/server.md>), [servers](<https://devfeed.tech/tags/servers.md>), [tech-matters](<https://devfeed.tech/tags/tech-matters.md>)

### AI overview

The article explains how random name attacks overwhelm authoritative DNS servers by generating queries for nonexistent names, bypassing recursive resolver caches and potentially causing domain availability failures. It also describes APNIC Labs' measurement work on nonexistent-domain responses to improve DNS resilience.

### Source excerpt

At APNIC Labs we've been experimenting with understanding how the DNS handles requests to resolve nonexistent names to make the DNS more resilient to random name attacks.