Research And Design Of Household Firewall For Variable Security Operation Protocol

The technology of Internet of Things penetrating into family life has become an irresistible trend of nowadays.However,while people are looking for the functional diversity of home network devices,the structure of home network is becoming more and more complex.Because of the current situation of home intelligent equipment has various kinds of networking protocol,inconsistent standards,and more attention is paid to the function instead of security,while the research of home security network devices has been in progress.In order to satisfy the requirements of compatible,compact and efficient home network security devices,the thesis carries out the research and design of a home firewall oriented to Variable Security Operation Protocol.The Variable Security Operation Protocol is compatible with the underlying device communication protocol in application used as the control carrier of home network devices,and the household gateway device is simplified to build a home-level network firewall.Network protocols,data packet filtering,security checking and other security operations are carried out.The main content of this thesis includes:(1)Considering the research front,the analysis aimed at the functional requirements and performance requirements of the household firewall oriented to Variable Security Operation Protocol.The overall design scheme of household firewall combining with target quantification is put forward.At the same time,the key technologies involved in the research are dissected.(2)According to the overall design scheme of the household firewall,the hardware part of the home gateway is designed.It includes the main control module,the coordinator of variable security operation protocol and the node of home equipment network,they are designed by circuit schematic diagram,PCB design and physical production.(3)Combining the overall design scheme of the household firewall with the design of the hardware part,the design scheme of the software part is put forward.By implementing the Variable Security Operation Protocol system of the home device control network,the protocol communication between the device terminal and the control terminal is realized,and improve Netfilter/Iptables framework in Linux gateway based on RT5350 F,construct network firewall in home environment,reconstruct rule management module,customize matching conditions,complete the design of firewall management interface under LuCI framework,covering user management,port filtering,transmission control,user customization and other functions.The test result show that the resource proportion of compatible Variable Security Operation Protocol is reduced by 5.7% and the response rate is increased by 2.0% compared with the protocol system in the same environment,while the average response time of home firewall is 96 ms,the average error rate is 0.13%,and the waiting time of users is 176 ms,which satisfies the expected design requirements.It can be used as a compatible and efficient network system for home devices.The thesis is of high reference value for the application of multi-protocol security gateway in home environment.