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Security vulnerability scanning technology is a static network system detection method that uses security scanning software to determine whether a network system contains potential vulnerabilities that could be exploited by attackers. Once such vulnerabilities are identified, it is necessary to take immediate action to address them, such as updating the versions of systems and applications, installing patches, adjusting security settings, and enhancing security measures. http://p1.pstatp.com/large/pgc-image/15272399755793de34e1dfd From a fundamental technical perspective, vulnerability scanning can be divided into two main types: host-based vulnerability scanning and network-based vulnerability scanning. 1. Host-based vulnerability scanning technology: Host-based vulnerability scanning involves logging in to the hosts on the target network as root, recording the various key parameters of the system configuration, and analyzing any vulnerabilities in those configurations. Using this method, a lot of configuration information about the target hosts can be collected. Once the configuration information of the target host is obtained, it is compared with a security configuration standard library; any items that do not meet the standards are considered vulnerabilities. Typically, an agent or services are installed on the target system to enable access to all files and processes, which also allows host-based vulnerability scanners to detect more vulnerabilities. http://p1.pstatp.com/large/pgc-image/15272399756406fbf6b01d4 2. Network-based vulnerability scanning technology: Network-based vulnerability scanning involves remotely detecting the services available on various TCP/IP ports of a target host, and recording the responses sent by that host. Using this method, it is possible to gather various pieces of information about the target host (for example: whether anonymous login is possible, whether there are writable FTP directories, whether Telnet can be used, and whether http is running as root). After obtaining the information regarding the TCP/IP ports of the target host and the corresponding network services, it is compared with the vulnerability database provided by the network vulnerability scanning system; if a match is found, it is considered that a vulnerability exists. Furthermore, conducting aggressive security vulnerability scans on the target host system by simulating hacker attack methods, such as testing weak passwords, is also one of the ways to implement the scanning module. If the simulated attack is successful, it is considered that a vulnerability exists.