Abstract: Firewall is an important part of network security research, and data packet capture is the premise of packet filtering firewall. This paper studies the data packet capture module of personal firewall based on Linux host, focusing on the structure, composition and function of data packet capture module. First, the importance of information security and firewall is discussed, and a detailed classification of firewall is given; then the overall design and software and hardware platform principles of personal firewall based on Linux host are analyzed, and then the structure and principle of data packet capture module under Linux are discussed, and its specific implementation steps are detailed. [Author Abstract]
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