If you are using Dovado Wi-Fi router, you can set it to use SafeDNS filtering pretty, since there is a SafeDNS module in router firmware.
To enable filtering follow the following steps:
1. Open your browser and go to you router’s control panel 192.168.254.1
2. Log in with your credentials (admin and password by default) and go to Parental control tab in the left menu.
3. Click on Settings in the top menu.
4. Check the box Enable SafeDNS, enter your credentials and click on the Save settings button.
Done! You can see that everything is correct by the status message on your right.