Application Of Firewalls Technology In The Network Security

Now the Internet makes great progress rapidly, the TCP/IP protocol used by the Internet solutes the connection among different hardware, software platforms and operation system. These explain why the Internet can become stronger in the world.With the development of the network, people can't live and work without networks more and more. In this case, the security of network becomes harder. For the network is opening, so losing data and network collapse occurred usually. The problem of security becomes more harder for the shortcoming of the TCP/IP protocol used by the Internet. In this case, how to solute the problem of the security for computer network is a question that must be saluted today.The information safety includes the system safety and the information safety. The system safety means the safety of the hardware equipment, the safety of the operate system and the safety of the application software. The information safety means the safety in the reservation and transformation of the information. According to the network status today, how to solute the network's security is more and more emergent. The firewalls should be the most simple and infective device to solute the network's security. But the firewalls are constant, and the things that affects the network is becoming continually. How to use the firewall to solute the network security is not as simple as to choose a device. And making use of the firewalls fully is more important. So we should try our best to use the firewalls to adapt the network security. The paper compares the principle and construction of the network, and analyzes some of IDS, then introduce the roll of the firewalls in the network security. And the paper also explains the important roll in the network in the application aspect, by referring our company's network. The paper propose that only through keeping away the danger in the outside and prevent the danger inside can we ensure the information safety.