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blechschmidt / massdns

A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)
GNU General Public License v3.0
3.05k stars 456 forks source link

Removed dead servers #139

Closed davift closed 1 year ago

davift commented 1 year ago

Thanks for the cool app!

Testing script:

#!/bin/bash
wget -q -O dns-server.list "https://raw.githubusercontent.com/blechschmidt/massdns/2e0a7c8778d87967f46a9707f36367da42ace788/lists/resolvers.txt"
while read SERVER;
  do ( dig example.com @$SERVER | grep 'ANSWER: [1-9]' > /dev/null && echo $SERVER & );
done < dns-server.list
blechschmidt commented 1 year ago

Thank you for your contribution. I have still cleaned a few resolvers from that list using https://github.com/vortexau/dnsvalidator.

davift commented 1 year ago

Awesome! I think that list is so big that if we scan every day and from different geographical locations we will clean up even more. Take care.