In my previous post , I documented my notes on setting up a new PowerDNS Recursor for our own clients.
In this post, I will present a simple way to reduce unnecessary traffic by blocking every FQDN you dont want.
Download a well known custom HOSTS file:
# curl -s -L http://winhelp2002.mvps.org/hosts.txt -o /etc/pdns-recursor/hosts.blocked
Add your FQDNs you want to block,
# echo "0.0.0.0 facebook.com" >> /etc/pdns-recursor/hosts.blocked
be very careful not to block something you need.
Reminder: No support for wildcards, only FQDNs
Edit your /etc/pdns-recursor/recursor.conf to support the new hosts file:
restart your pdns and test it
# dig www.facebook.com @localhost
;; ANSWER SECTION: www.facebook.com. 86400 IN A 0.0.0.0
Once you have done that, you can edit your hosts.blocked when ever you want!
But dont forget to reload:
# rec_control reload-zones