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Along with the rapid development of Internet, more and more enterprises and users connected to the Internet, network, as humans build a rich and colorful virtual world. The convenient and fast Internet makes our lives have changed dramatically, we can get through the network to exchange information and resources. Nowadays, the network has been extended to every corner of the world, the network security question has become increasingly prominent, the people in a fully enjoy the convenience brought by Internet and efficient, but also continuously suffered various computer virus infection and hackers malicious attacks, network security is paid more and more attention. In network security solutions, establish or firewall Settings is a very critical and effective, so how to use the link of the safety of network firewall protection, how to protect information security, also become the focus of this paper. This paper firstly introduces the main types and functions of the firewall, and poin