Abstract: The computer networks and internet networks are exposed to an increasing number of security threats. With new types of attacks appearing continually, developing flexible and adaptive security oriented approaches is a severe challenge. This paper discusses the security of computing systems and shows how to protect computer-related assets and resources. The paper highlights different security threats and concerns across computer networks and shows how firewalls detect these threats. At last, dissimilar firewalls similar to Packet filter submission Gateways and individual Firewall are summarized and compared according to different network scenarios. The paper also proposes a new framework for the compulsion, threat management and safeguard of network environments.

Keywords: Security system, firewalls, threats, packet filtering, application gateways. ident.