[dns-operations] solutions for DDoS mitigation of DNS

Paul Vixie paul at redbarn.org
Fri Apr 3 03:17:31 UTC 2020

On Friday, 3 April 2020 02:55:21 UTC Tessa Plum wrote:
> Where is "dnsdbq" coming from? I didn't see my ubuntu system has that a
> command.

it's an example of passive dns lookups. the source code is here:


there are dozens of passive dns database systems; only two are currently 
supported by that tool. (more would be welcome, it's apache 2.0 licensed!)

> Paul Vixie wrote:
> > $ dnsdbq -r '\*.berkeley.edu/ns' -A 2020-01-01 -j | jq .rrname | uniq


More information about the dns-operations mailing list