The term that means stateful IDS will be able to recognize the request prior to the transmission of the IDS. Understand and track the state of the network, transport, and application protocol, for example, the stateful FTP protocol-based profile will be able to detect anything unusual or intrusion on the receiving FTP transmitted by information transmission can be detected by the authentication has not been passed, because the IDS will be able to recognize the authentication state of every session or can be detected. Traffic to the other machine after successful authentication from one another.(FTP bounce attack)The ability to recognize the process of authentication and session tracking of authenticator IDS data from this category helps to verify the incident dramatically.The limitations of this type of detection is the specification of the protocol or information often does not have the integrity not to create a complete profile, it is detecting the wrong results and when changes have been made to improve the protocol will need to update the profile IDS with the IDS also. This category requires a high specification hardware because it requires complex calculations makes prices affordable.6.3 computer system vulnerability (Computer Vulnerabilities)Vulnerability of a system or program (Vulnerability) means weakness or vulnerability. In the system. The system's vulnerability may be caused by bugs or defects from the design system. System vulnerabilities can arise from neglect or ignorance of the designer. The program, as well as other reasons, which can cause the system to allow people to break the system (including cracker, hacking and nuk GER) fool the application (application) to destroy the present. Their own data and the data is hidden, the system that controls the application or system exploits to gain access to data and system memory without getting. Permission to use the code.To solve the system's vulnerability, most often made by the installation program. Against computer viruses, firewalls and IDS, or install a patch of the manufacturer of the program.
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