Forbidden page when i surf to my public ip

When i surf to my public ip adress (from isp) then i see a forbidden page:

Forbidden

I dont know why. its a littlebit scary. How can i turn this off?

Please use our forum for questions related to Pi-hole only. We are not a general support provider, you need to visit https://www.raspberrypi.org/forums/ for that kind of support.