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With the increasing popularity of smart phones and 3G networks , the rapid growth of the scale of the mobile user , the phone is moving in the direction of smart, connected , open development, security issues have become increasingly prominent . A security software there is a growing need to be able to monitor the cell phone network behavior , real-time protection of user 's information security . In this context , this paper defined the task topic , design and development of a network firewall software based on the Windows Mobile platform this article first introduces the research background and the main content , an overview of the phone network firewall technology background . Subsequently for the characteristics and requirements of the firewall system , needs analysis , clear the firewall system functions . Then divided firewall system module , divided into five modules , including data management , user interface , firewall , software, communications, communications control , respectively . The outline design and detailed design of each module , combined with the use case diagram , sequence diagram , class diagram of the functional modules refinement, describing its data structure defined process to achieve concrete realization . Finally, the implemented system testing and the effect of the show , and on this basis, summarizes the research results , the proposed network firewall systems and modules can be further improved . The firewall system described herein has been achieved, and as a commercial product used by the user .
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