Intrusion Detection Systems, Tools and Techniques – An Overview

Organization’s crucial data are highly endangered due to several security attacks and threats. Intrusion is one among such type of threat. Intrusions are efforts that attempt to elude normal security mechanisms of computer system. Intrusion detection is the process of monitoring and analyzing the events arising in a computer network to identify security breaches. Intrusion Detection System is the most important tool in maintaining network’s security. This paper provides an overview of Intrusion Detection System and helps reader gain some fundamental concepts and methodologies used by IDS. This paper also provides discussion about types of IDS, approaches and types of attacks in the network and intensive literature survey. Finally, comparison of several IDS methods with merits and demerits are also presented in the paper.