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What Is a Firewall?

In Simple Terms, a firewall is a system with endpoint protection technology that prosecute an access control policy between two networks—your private LAN and the unsecured public Internet. The system helps you to determines which inside services can be accessed from the outside, and vice versa. the firewall works more than the locking system of your network. It secures it as well. It also provides the network security administrator with data related to what kinds and amount of traffic passed through it.

It also informs how many attempts were made to break into it. It not only prevents access, but also monitors who’s been inhaling around your LAN, and also assists to figure out breaches in your security. From keeping the external threats from getting access to your system to protecting against threats including denial of service, Firewalls controls and manage what traffic is allowed to traverse from one side to the other to protect your system from hacking attacks and DOS attacks.

Here are the few Benefits of having a Firewall

Having a Network firewall security system not only secures your network but also ensures that you have uninterrupted network availability with robust access to cloud-hosted applications. Here are the few advantages of having a firewall security system-

  • It defends threats, malware, and hackers that tries to gain access to your data system.
  • It has the ability to monitor network traffic.
  • To It helps Stops Virus Attacks
  • It Prevents your system from Hacking threats
  • It enables to Stops Spyware.
  • It completely Promotes Privacy.

Types of Firewalls

Firewalls in any network are expected to keep our home and corporate networks safe & secure. It’s a simple program designed to filter out unnecessary or conflicted information which pass through your network, as customized by the network security user. Let us walk you through the types of network firewall securities you can opt among.

  • Hardware firewalls: These types of firewalls can often be found attached to a router or networking device, or even found as separate stand-alone products. Needless to mention, these firewalls are considered essential to managed IT services.
  • Software Firewalls: Mainly installed in our computers, these firewalls can be customized and provide moderate levels of control on the protection features and functions, making them weak cases of advanced network security breaches.
  • Application layer firewalls: what make them unique is their ability to make a layer of security mechanisms on the top of defined applications like rule of HTTP connections, FTP servers, etc., to laser point and block attacks to the network.
  • Packet Filtering Firewalls: These make users able to examine the passing packets through-out the network and allow or deny user defined entries of packets. As the process gives you an idea, properly configuring the filters can be difficult.
  • Circuit-level Firewalls: Once the UDP and TCP mechanisms are applied, this particular firewall applies a number of security measures. In this, the packets are exchanged directly between the hosts without further oversight or filtering.
  • Proxy server firewalls: These are mainly responsible for checking on the messages which enter and exit a particular network, while hiding the real network addresses from external inspection.
  • Next-Gen Firewalls (NGFW): These firewalls make users able to filter moving traffic through a network by determining the application types and ports which they are assigned to. In order to have greater and strong security and more self-sufficient network inspection, this firewall blends standard firewall with additional functionalities.
  • Stateful Firewalls or Third Gen. Firewall Technology: This type of firewall classifies traffic based on the destination port and tracks every interaction between internal connections. Interactions are no longer defined by the ports and protocols as these new firewall technologies increase usability and assist in expanding access control granularity.
  • Users are able to use more than one of these firewall technologies at a time for their overall network security.


Again, it’s mandatory to understand that firewalls are not designed to remove or clean viruses, but it helps you to assist your system with virus detection which is an extremely essential role of an overall virus security plan. However, firewall can protect the network from the wide area device to which it is attached.

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Source Link : Understanding Network Firewall Security System