Pi-hole is a Linux network-level advertisement and internet tracker blocking application which acts as a DNS sinkhole, intended for use on a private network.

"The" Fritzbox, stylised as FRITZ!Box, is a series of residential gateway devices produced by the German company AVM GmbH. FRITZ!OS is the FRITZ!Box operating system and can be easily controlled via your browser. User-friendly menus, easy-to-understand wizards, and the optional advanced mode come in handy in all scenarios.