Implement CMDA Wireless POS System Based On FreeRadius And Optimize The Security And Reliability Of The System Based On Facts

With the rapid development of economy,especially logistics distribution system,businesses are more likely to be frustrated by counting,counterfeit,and heavy workload,which are resulted from cash transaction model,while enjoying a growing market share based on service quality improvement.To better solve aforementioned problems,bank card business emerges and prospers.According to the statistics,about one third of bank card issued by domestic banks are inactive.The delivery volume of POS and unhindered telecommunication system are vital to user-friendly bank cared?Under the background of the "Ningbo Union Pay Wireless POS System" program and according to analysis of needs,this paper trying to design a Wireless POS System based on FreeRadius CDMA wireless networkthrough the wireless POS network interface.Wireless network directly determines the performance of wireless POS system pros and cons.In this paper,we studied the current principle and formation of realizing a wide of range of Wireless POS Networkand analyzed the merits and demerits of the main current wireless POS technology,selected the optimal case to design the network interface.Because the communication data between the wireless POS and financial host are highly confidential financial data and the data transmission network contains public transmission network and cable data transmission network whose security is limited.Meanwhile,due to the widely use of TCP/IP protocol and weak security of IP,the security of wireless POS communication data become unreliable.For the realization of network access security,we studied the realization of the principle of L2TP based on the Free Radius CDMA VPDN wireless virtual private network access technology,realized the secure access to the wireless POS network and optimized the security of transmission line.Moreover,after considering that Apache and Tomcat both can be set as independent WEB server,we adopt the Apache+Tomcat structure to acquire better security and high scalability.At the same time,in order to ensure access to the user's uniqueness and prevent embezzlement,by studying of L2TP VPDN authentication and RADIUS Protocol and using RADIUS,we realized the three unified certification of the IMSI number,user name and password.Finally,I construct and adjust the system,which passes the test and operate online.The operation status is safe and sound and can suits customers' requirement.