Quick way to use adsuck chrooted in /var/adsuck mkdir /var/adsuck cp %%EXAMPLESDIR%%/* /var/adsuck # Adsuck forward to your old dns server cp /etc/resolv.conf /var/adsuck # Enable and start adsuck echo adsuck_enable=\"YES\" >> /etc/rc.conf /usr/local/etc/rc.d/adsuck start # Use adsuck as dns server echo "nameserver 127.0.0.1" > /etc/resolv.conf If you're using DHCP consider configuring your dhclient.conf(5) to prevent resolv.conf updates.