If you are in a local area network environment with a host of running Bittorrent or Gnutella, the speed of the network is significantly reduced. This kind activities is enough to paralyze the entire network because P2P programs like Bittorrent and Gnutella makes full use of network bandwidth to transmit data, Therefore, an appropriate limit for improving the performance of local area network is a great benefit. Layer7 and IPP2P are the tools to effectively limit the P2P network packet.