The first thing we need to do is find the IP address of a website.
If you already have an IP address, follow the steps from the second section. This is because Windows requires an IP address and doesn’t directly support the URLs. To block a website with Windows Firewall, you need to know its IP address(s). Steps to Block Website or IP Address with Windows Firewall So, without further ado, let me show you the steps to block a website URL or an IP address in Windows Firewall.