What is Firewall?
A firewall is a network security system that monitors and controls incoming and outgoing network traffic on the basis of predefined security rules in the firewall. A firewall typically establishes a barrier between trusted internal network users and the untrusted external network such as the internet. To know more about the “What is Firewall and its types” keep reading this article till the end.
It ignores data that comes from a suspicious location or unsecured location. A firewall plays a very important role in any network because it provides a protecting barrier against many types of attack coming back from the outside world.
Mainly the Firewall is categorized into two types:
- Hardware Firewall
- Software Firewall
A Hardware firewall placed between the local network of your computers and the internet. The hardware firewall inspects all the data or the information that comes from the internet passing through the firewall, It blocks the unwanted or harmful data that passes through the firewall and only allows the trusted and useful data to the internal network.
In order to protect the network properly without compromising with performance, hardware requires expert setup, and so may not be a realistic solution for the companies without a dedicated IT department.
A hardware firewall uses packet filtering to analyze the header of a packet to identify its source and destination. This data is compared to a collection of predefined or user-created rules that verify whether or not the packet is to be forwarded.
Software Firewalls are installed on a single computer on a network. It let’s allow data to one program and blocks others while doing this. Software firewall also filters incoming and outgoing data or the information from the external network.
The major disadvantage of the software firewall is that they require the installation, updating, and administration of each and every computer in order to work properly.
Software firewalls will protect your computer from the outside attempts to control or to access your computer. Depending on your choice of software firewall, it could also provide protection against the most common Trojan programs or e-mail worms.
The difference between hardware and the software firewall in boundless. For the best protection of your computer and network is to use both as each provides different but much essential security features and benefits. It is essential to update the firewall, operating system, and other software to maintain optimal protection.
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