In this article today we are about to talk “Firewall” What is Firewall, how it works and Firewall many types of Firewall ? No one can deny the fact that this dynamic rise of the Internet has brought the world closer, but at the same time, it has also left us with a variety of security threats.
In order to ensure the confidentiality and integrity of valuable information of a network from external attacks, we must have some robust mechanism and this is where the ” Firewall” exists.
In today’s time malicious activity like- Virus, Trojans are made by hackers which allow hackers to hack our mobile or computer anytime and we will not even know about it.
What is Firewall ?
Firewall software or firmware (firmware programming that is written in the nonvolatile memory of a hardware device) that implements a set of rules about which data packets are allowed to enter the network and which Not to
The firewall has been incorporated into a variety of network devices to filter traffic and reduce the risk of malicious packets on the public internet affecting the security of the private network. Firewalls can also be purchased as stand-alone software applications.
Firewalls are tools that can be used to increase the security of computers connected to a network, such as a LAN or the Internet.
How Firewall Works?
Firewalls act as a filter between your computer/network and the Internet. You can program what you want to get out and what you want to get, but nothing else will be allowed.
How do firewalls protect Businesses?
- Firewalls used in many Large corporations often have very complex firewalls to protect their extensive networks.
- It configures to prevent employees from sending certain types of email or transmitting sensitive data outside the network.
- It is programmed to prevent some websites (such as social networking sites) from accessing them.
- Extensive configurations usually have to be handled and maintained by highly trained IT specialists.
Types of Firewall ?
There are three types of firewalls which is use by companies to protect their data and equipment to keep destructive elements out of the network. Packet Filters, Stateful Inspection and Proxy Server Firewalls. Let us give you a brief introduction about each of these.
- Packet Filters
It is used to control network access by monitoring outgoing and incoming packets and passing or halt them based on IP addresses, protocols and ports.
Packet filtering techniques are suitable for small networks but become complex when applied to large networks. It should be noted that these types of firewalls cannot prevent all types of attacks. They can neither deal with attacks that use application layers vulnerabilities nor fight against spoofing attacks.
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- Stateful Inspection
Stateful Packet Inspection, sometimes called dynamic packet filtering, is a powerful firewall architecture that checks end to end traffic streams. These smart and fast firewalls use an intelligent way to shut down unauthorized traffic by analyzing packet headers and inspecting the status of packets along with providing proxy services. These firewalls operate on the network layer in the OSI model and are more secure than basic packet filtering firewalls.
- Proxy Server Firewalls
Also called application level gateways, Proxy Server Firewalls are the most secure type of firewalls that effectively protect network resources by filtering messages at the application layer.
Proxy firewalls mask your IP address and limit traffic types. The proxy server provides the best Internet experience and improves network performance.
It is all about basic firewalls that are configured to protect the private network. No matter which firewall you choose, make sure to have a proper configuration because any flaws can cause more damage to you than a firewall. Create a secure network and deploy a suitable firewall to limit access to your computer and network.
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