Http rule base intrusion detection and prevention system

Abstract

The objective of HTTP Rule Base Intrusion Detection and Prevention System (IDPS) is to provide security for one of the application layer protocols namely HTTP (Hyper-Text Transfer Protocol). Such an HTTP based Intrusion Detection System (IDS) detects header attacks and attacks in payload (includes HTML and scripting). Misuse detection uses signature based approach where predefined patterns are defined. The input text or pattern is compared with the predefined signatures to detect malicious activity. Furthermore new types of attacks are continuously created. The new attacks created by attacker are also detected by these IDS, only if attacks are in the form of signatures. Signatures are defined either in a single-line or by complex script languages and are used in rule base to detect attacks. These signatures and rules have to be updated periodically as the attacks are continuously changing its nature of attacks.