Google Research

RFC 7871 - Client Subnet in DNS Queries

  • Carlo Contavalli
  • Wilmer van der Gaast
  • David C Lawrence
  • Warren Kumari
IETF, IETF (2016)


This document describes an Extension Mechanisms for DNS (EDNS0) option that is in active use to carry information about the network that originated a DNS query and the network for which the subsequent response can be cached. Since it has some known operational and privacy shortcomings, a revision will be worked through the IETF for improvement.

Learn more about how we do research

We maintain a portfolio of research projects, providing individuals and teams the freedom to emphasize specific types of work