Introduction - If you have any usage issues, please Google them yourself
Packet filtering (packet filtering) is a software or hardware device to the network upload or download data from the network flow selective control process. Packet filter is usually in packets from one network to another website of course they allow or prevent the passage of (more common in the internal network from the Internet to transmit data, or from the internal network to the Internet transmission). Type of packet filtering firewall through which all incoming and outgoing packet inspection, and to prevent those who do not comply with established rules of the transmission packet.