Abstract: The goal of this study is to develop a model of an application gateway that can be used to manage perimeter security in a client/server environment. The gateway acts as a traffic controller between the internal (client/server) LAN and external networks and systems. It ensures that only authorized packets are allowed to go into the LAN from the external systems. It also, guarantees that unauthorized packets are not forwarded to the external environment from the internal local area network. The research conducts an exploratory study of computer networks and client/server systems as well as some of the dangers posed to computer networks. It also examines some of the attempts at curbing network related security threats as well as the strengths and weaknesses of each approach. The study concludes by formulating a model of an application gateway for managing security in client/server environments. The system design tools used in this study is basically the data flow diagram. Possible areas of future study include the extension of the model to support more protocols; the exploration of the need to combine the benefits of the traditional packet filtering processes with those of an application gateway as well as the possibility of integrating the model with other network security strategies.
A.J. Jegede , G.I.O. Aimufua and H.O. Salami , 2007. A Specification of an Application Gateway for Client/Server Systems . Asian Journal of Information Technology, 6: 847-853.