Speaker
Description
In 2002 the IP address for j.root-servers.net was changed in order to provide the service from multiple locations using IP anycast. Since that time Verisign has continued to respond to queries sent to J-root's old IP address, 198.41.0.10.
A few months after the address was changed, the old address received approximately 1500 queries per second. Now, nearly 23 years later, the old address still receives 350 queries per second. Based on common understandings of how recursive resolvers work, and especially the process of root server priming, this has defied explanation.
ICANN recently commissioned a team of researchers to thoroughly study the potential impacts of changing the root server names. A short comment made in their report hinted at why these queries might persist. In this presentation we'll tell the story of how this long-time bug was rediscovered and confirmed as the likely reason we continue to receive queries on the old J-root address from a set of resolver clients.
| Talk duration | 20 Minutes (+5 for Q&A) |
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