PeerGuardian helps protect your privacy by blocking many ranges of aggressive IPs while you use P2P. PeerGuardian 2 is Methlabs premier IP blocker for Windows. With features like support for multiple lists, a list editor, automatic updates, and blocking all of IPv4 (TCP, UDP, ICMP), PeerGuardian 2 is the safest and easiest way to protect your privacy on P2P. Plus, by integrating with Blocklist.org, lists are built custom just for you.

PeerGuardian 2 is Phoenix Labs' premier IP blocker for Windows. PeerGuardian 2 integrates support for multiple lists, list editing, automatic updates, and blocking all of IPv4 (TCP, UDP, ICMP, etc), making it the safest and easiest way to protect your privacy on P2P.

PeerGuardian works by blocking and logging all TCP/IP connections to and from known IP ranges used by known P2P foes, such as the RIAA, MPAA, MediaForce, MediaDefender, BaySTP, Ranger, OverPeer, NetPD, and more.
PeerGuardian is a powerful, yet small firewall program that was especially designed for P2P users who want to protect their computers from unauthorized searches instigated by private agencies and corporations.

To make sure that the block-list used to block malicious connections is up to date; PeerGuardian uses an on-line block-list Database that is continuously updated on a daily basis -- so your privacy will remain safe while swapping files.
PeerGuardian is compatible with all TCP/IP based file sharing applications, such as Kazaa, iMesh, LimeWire, eMule, Grokster, DC++, Shareaza, and more. In short, PeerGuardian is the must have tool for any file swapper.
PeerGuardian is not advertising supported, nor does it require registration, and no information is collected from or about product users.

The license of this software is Freeware, you can free download and free use this ip utility software.