PeerBlock is a small utility to block the unwanted or malicious incoming connections in Windows. It is a successor to the PeerGuardian software that was popular a few years ago. Like PeerGuardian, PeerBlock is also designed for the people who use the P2P software like FrostWire in their Windows computers. When you are using such a P2P software, some of the known malicious computers might try to connect to your PC and cause some damage. You can block all of these known harmful servers using PeerBlock.
When you install PeerBlock, it asks you what type of ranges you want to block. You can block bad P2P servers, advertising servers, known spyware servers and the servers belonging to universities. You may have a specific reason of your own to block these servers on your computer. But whatever the reason is, PeerBlock can block them for you.
Apart from the known servers of a particular type, you can also add custom servers or a list of custom servers to be blocked. You can also choose how often the lists of such servers are updated. The default option s every 2 days. But you can pick from anything from everyday, every second day, every week etc.
Once these formalities are taken care of, PeerBlock starts to block these servers in the background. It displays a log of servers being blocked and the options to disable the protection or allowing/disallowing the HTTP connections. You can also manage lists (for blocking particular type of servers) and check their updates from its main interface window.
You can access and control PeerBlock from its system tray icon (notification area icon). You can right-click on this icon and it will show you all the available options like enable/disable the protection, allowing HTTP or allowing it for some minutes only temporarily, check for updates and more.
You can download PeerBlock from https://sourceforge.net/projects/peerblock/files/.