The most important and precious asset we have today is our Data, and protecting it should be our first task. However, there are many challenges that we face while protecting it. One of the best solutions for this problem is a firewall. It will help us to protect our data and our systems. In this post, we will be learning about firewalls, their types, and their working principle.
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A firewall is a security device that monitors and controls incoming and outgoing network traffic based on predefined rules. As the name suggests, it works as a wall that protects our system from the outside untrusted network, the Internet.
The user sets some security rules and on that basis, it accepts, rejects, or drops that specific network. Firewalls can be hardware or software-based and are commonly used in networks to enhance security and enforce access policies. It safeguards our system from unauthorized access and cyber threats. Firewall security is basically used by large organizations for whom data security is a major concern.
As discussed above, firewalls are the devices that allow trusted networks and reject untrusted and unwanted networks into our system. The device allows us to set some safety rules initially and on that basis the incoming network traffic is judged and appropriate action is taken upon them.
For example, just imagine the watchman appointed at the college gate. The work of the watchman is to check the student entering the college and to either allow him to enter the college or not, based on some basic guidelines set by the college. The student will carry their identification card (IP address, source address in the case of network) and if it is unauthorized or untrusted then the student will not be allowed to enter the college.
The firewall works similarly to the watchman and welcomes only incoming traffic that has been configured to accept, authorized, and trusted.
As shown in the above figure, the network has its own IP address, protocol, destination address, and port number. On this basis, the network is either given the access or not.
Firewalls are categorized into two types:
Firewalls play a significant role in security management in businesses. The following are some of the most significant benefits.
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