The Network Inside And Outside Isolation Of Guizhou ATC System Design And Implementation

With the rapid development of network technology, making the application ofvarious types of networks have been applied to the important range of people’s lives andsocial stability, but the exchange of information in the Internet network, a large numberof network industries also revealed serious damagea data system, so that the networkisolation technology becomes popular content for domestic and internationalgovernment and research institutions and scholars. The purpose of net isolation is toprotect the inner net in safe，while that of net connection is to make the data goingbetween inner net and outer net．In this thesis, the principle of network security today and some of its keytechnology to achieve it，some theoretical methods and the key technology of whichwill be of great use for the related study：①In this thesis,by applying buffers technology,authenticated technology,TCP/IPprotocol stripping and special protocol sealing，the plan，in the circumstance ofseparation of inner and outer nets，implements the data exchange in safe，thus ensuringthe physical isolation between the inner net and outer net．②In the process of data communication，Data communication process, it’s core tocut the network transport protocol, such as TCP/IP protocol, and through specialsoftware and hardware scan data.③The progress made in the exchange of data, the Internet and the Internet is tomaintain the physical isolation of the data exchange, and to ensure safety.In the paper，GAP is designed with the technology of double channel．And thepaper analyzes the process of net communication，the level model of TCP/IP and itsdata format．It implements the special protocol in GAP by using C API library（1ibnet、libpcap、libnids and libicmp），the technology of which can enhance the speed of dataexchange and improve the safe performance of the system．...