What is Firewall ? Explain Firewall in Detail | And Explain Types of Firewall.

Hello Friends I am Deepak Kumar and We Will Learn About This Article What Is Firewall Explain in Detail And Types of Firewall So Let’s Start Guy’s.

A Firewall may be a network security device that monitors incoming and outgoing network traffic and permits or blocks data packets supported set of security rules. Its purpose is to determine a barrier between your internal network and incoming traffic from external sources so as to dam malicious traffic like:- Virus and Hackers.

Basic Diagram of Firewall

There are Five Types of Firewall

1. Packet Filtering Firewall:-It Operates in line at Junction point where devices such a Router and Switches do their work. Packets that are flagged as troublesome are generally speaking unceremoniously dropped that is, they are not forwarded and thus, case to exist.

2. Circuit Level Gateway:- they're established between the local and remote host to work out whether the session being initiated is legitimate whether the remote system is taken into account trusted. They do not inspect the packets themselves.

3. Statefull Inspection Firewall:-It is on the other hand not only examine each packet, but also keep track of whether or not that packet is part of an established TCP or other network session.

4. Application Level Gateway:-The kind of device technically a proxy and sometimes referred as a proxy firewall.

5. Next Generation Firewall:-A typical Next Generation Firewall (NGFW) combines packet inspection with stateful inspection with stateful inspection and also includes some variety of deep packet inspection, as well as other network security systems, like intrusion detection/prevention malware filtering and antivirus.