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Computer networks have added new dimensions to the global communication. But intrusions and misuses have always threatened the secured data communication over networks. Consequently, network security has come into issue. Now-a-days intrusion detection systems play an important role in security infrastructures. Intrusions typically start with intruders infiltrating a network through a vulnerable host and after that approaching for further malicious attacks. The techniques used for intrusion detection have their particular limitations. Any of the intrusion detection systems proposed so far is not completely flawless. The host based systems as well as the network based systems have their own limitations. So, the quest for betterment continues. In this progression, here we present NIDS: a complete intrusion detection system which reduces some significant problems contained by the previous systems such as trust issues and message spreading problems. In the proposed IDS we donpsilat need to install the system for every host. That reduces the system overhead to a reasonable extent. This system generates steady responses against intrusions and stops the intruder to proceed for further attacks.