Abstract

In the entire globe, higher learning institutions, organizations and governments are completely dependent on the computer networks which plays a important role in their day to day operations. So the necessity for protecting those networked systems has also increased. Intrusion Detection System which is increasingly a key element of system security is used to identify the malicious activities in a computer network or system. There are different approaches being employed in intrusion detection systems, but unfortunately none of each of the technique so far is not entirely ideal. Intrusion Prevention Systems (IPS) evolved after that to resolve ambiguities in passive network monitoring by placing detection systems on the line of attack. The main functions of IPS's are, as explained to identify malicious activity, log information about it, and attempt to block or stop and report that activity. IPS in other words is IDS that are able to give prevention commands to firewalls and access control changes to routers. The proposed paper made a survey on the overall progress of intrusion detection systems & intrusion prevention system. It also includes survey of existing types, architectures and techniques of Intrusion Detection Systems & Intrusion Prevention System in the literature.

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