May 10 – 11, 2014
Sofitel Warsaw Victoria
Europe/Warsaw timezone

Analysis of DITL root data and comparison with full-resolver's data.

May 11, 2014, 4:30 PM
Opera (Sofitel Warsaw Victoria)


Sofitel Warsaw Victoria

11 Królewska Street 00-065 Warsaw
Public Workshop


Mr Kazunori Fujiwara (Japan Registry Services Co., Ltd)


The past analysis reported numbers of queries sent from each address to root DNS servers. There are 30,000 IP addresses which send over 100,000 queries in 48 hours. 100,000 queries per 48 hours seem to be too much. However, a full-resolver managed appropriately sent 110,000 queries in 48 hours at 2012 DITL timing. It served 180 queries per second from thousands of clients. The author replayed the 48 hours client queries to BIND 9 and Unbound full-resolvers, and compared number of queries to root DNS servers and other authorititative DNS servers.

Primary author

Mr Kazunori Fujiwara (Japan Registry Services Co., Ltd)

Presentation materials