Improving the Security of Internet Network By Building Internet Firewall

Internet and internal network attacks on corporate enterprises seem inescapable in today’s computing environment. Most companies admit to having been attacked over the past year. While the most costly attacks have been from the inside and external attacks from hackers and competitors are rising dramatically. firewalls tools solve this problem by automatically discovering and responding to attacks. This paper investigates the need for firewalls, discusses Building Firewalls and Firewall Technologies. Our emphasis in this paper is on the network security model and, in particular, the use of Internet firewalls it provided explanations of how to design a firewall at your site and how to configure Internet services such as electronic mail, File Transfer Protocol (FTP) and the World Wide Web(WWW).