When using a Pi-hole to block adverts, you will come across sites which you want to access, but which are being blocked. The message you will see is not readily apparent that the site has been blocked by the Pi-hole:
This is because the error message is displayed by the browser and all it knows is that the site didn't respond; it does not and cannot know that the failure was because the DNS query had been stopped by the Pi-hole. Fortunately, the Pi-hole project has a solution to sites being blocked when you really want to access them in the form of creating a whitelist. It is also easy to add a site to the whitelist.
To add a site to the whitelist, log into the Pi-hole admin interface and select Whitelist on the left pane:
Enter the domain to be whitelisted and click the ,em>Add button. All requests to this domain will now be allowed through without being blocked.