Firewall And The Security Levels - 1172 Words

The modern world is being automated in all fields in various aspects. Automation is achieved by the software development and this result in a faster work accomplishment and also in an easy, efficient way. Meanwhile, this progress has also got proportionate threat of misusing the software. As the internet has extended its roots providing access to various networks and also may provide access to inappropriate users. So, it is necessary to protect these networks and this purpose is served by network security. The security levels can be classified into two they are low level security and high level security. Network security includes many components and firewall is one such component that protects a network from various threats. Everything in†¦show more content†¦For every firewall there are certain policies or a set of rules which describe the functionality of that firewall. Firewall follows these policies and makes decision, whether to allow or decline a packet to penetrate th rough the firewall. So, it is necessary to have a firewall which is subjected to follow a good set of rules or policies. Packet Filtering: Packet filtering is the basic purpose of the firewalls in the network. The key theme of the packet Filtering is that firewall shacks either in the host or in router and monitors the traffic and flow of the data. The monitoring of traffic in the network is performed with respect to the policies of the network security (Vadim Zaliva,2008). Firewall Simulation: Reproducing the behavior of the firewall is essential, especially in the field of testing of security and the audit for the security. To reproduce a firewall physically, one has to carry out the pattern of the security policies which are brought forth by the existing firewall and should be placed in the circumstance of the environment provided by the network. Not only this, simulation of the firewall also needs the construction of the organized model for the firewall and helping it with the files that consists of the terms and policies (Wool.A,2001). Policy Optimization is considered to be the most important field of research. Though the soul rules of tend to be very simple but they need to be correspond with the large chunks of packets