ABSTRACT

Traditional security systems running solitarily were no longer satisfying, as hazards are growing in complexity, diversity and performance. Usually mankind got habit of using computers in multiple kinds such as communication, tourism, purchasing in finger tips, online banking. In order to defend against threats we need more meshed security system and at the same time users should have access to any website worldwide. It is mandatory to have a security systems which prevents from all the threats. Even though systems get exposed to many threats like a malware, worms, data leakage , NAC firewall has proposed a new pose which coordinate as well as communicate security statistics to various network security components using a strategy. NAC governs the connection from outside while giving protection to every network passing through the firewall produced. It is used to unify end point security technology, user or authenticator and network security enforcement. This paper deals with NAC, problems in security systems, solutions and explains in detail about groups like Microsoft trusted group, juniper who are involved in developing the standards for NAC.