In computing terms, the term firewall is a pretty common one. Most of the people do not realize it, but their computer usually comes built in with a firewall. For those who do not know, a firewall is basically a program that is designed to ensure that no unwanted traffic, spam or viruses/ hacking attempts are made on the network. The firewall continuously scans all incoming and outgoing network data packets of the network and in case it detects any sort of an anomaly, the firewall will prevent those data packets from entering the network. For instance, let us assume that somebody from within the network is trying to accept an email attachment sent from outside the network. If the firewall detects any sort of harm in the network packets, it will automatically block the attachment and prevent it from opening.
Similarly, firewall network security also applies to day to day browsing. If you are browsing on the internet and happen to come across a website that is likely infested with viruses, and the website attempts to download some viruses to your computer, the firewall will automatically detect these viruses and prevent them from causing harm to your computer. However, this is not such a straightforward process. For the most part, the one thing that really determines how effective your firewall is the type of firewall. For instance, the firewall that comes built in to most computers is easily bypassed by even the most standard of viruses. Hence, you can't rely on such firewalls.
When it comes to large scale networks, it is important to make sure that appropriate security is introduced. One of the most important ways by which companies prevent their networks from getting exploited is by installing large scale firewall appliances or unified threat management devices. These are powerful devices that are designed to carefully track and every individual data packet and then figure out whether it is harmful or not. Unified threat management devices are more than powerful, mainly because they include other functions of network security as well, apart from the basic firewall. There are so many different kinds of ways by which a hacker can hack into a network that it is nigh impossible for the user to protect just one aspect. As a result, large companies usually install numerous different kinds of security systems. Firewall network security plays a major role in the world of today, where cyber hacking is at its peak. People are more and more worried about having their personal data stolen that they have to take the right steps in order to protect their privacy. However, even though there are numerous powerful software based firewalls that can be used, it is important to make sure that you actually a purchase a hardware based network security appliance for your network especially if it is one that has a large number of nodes and important data flows through. Hence, this is all you need to know about firewall network security.
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