Therefore we need protection at each level of the hierarchy of networking systems.Ī good firewall should be sufficient enough to deal with both internal and external threats and be able to deal with malicious software such as worms from acquiring access to the network. A firewall is used to guard the network against nasty people and prohibit their actions at predefined boundary levels.Ī firewall is not only used to protect the system from exterior threats but the threat can be internal as well. In this tutorial, we will explore the various aspects of the Firewall and its applications.Ī firewall is a device or a combination of systems that supervises the flow of traffic between distinctive parts of the network. The concept of the firewall was introduced to secure the communication process between various networks.Ī firewall is a software or a hardware device that examines the data from several networks and then either permits it or blocks it to communicate with your network and this process is governed by a set of predefined security guidelines.
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