DNSwitness is a AFNIC scientific program to gather information from the DNS. It has two main software components:

DNSwitness's components are optimized for periodic, unattended runs, for instance from a cron job. Results are typicallly stored in a database, most of the time a rDBMS, to allow long-term surveys.

Licence: GPL See the COPYING file. Source code available at GitHub. DNSwitness has been developed at AFNIC, mostly by St├ęphane Bortzmeyer and Nicolas Delvaux.