AdGuard Home is a software for blocking ads and preventing tracking across the entire network. Once installed, it will protect all your home devices, and you no longer need to install any client software. If you have multiple devices, you can set it up and perform ad filtering within your local network.
The open-source software can be downloaded from GitHub. Here is the open-source download link: Download for Windows and Linux.
First, take a look at the screenshot:
Installation:
Settings:
Adding upstream DNS: