What is a Firewall ?
A Firewall is a system which continuosly monitors the traffic in a network for both
incoming and outgoing .It tracks analyse and decide whether to allow or block
network traffic based on certain rules and regulations.
Firewalls guard traffic at computer's entry point called ports where information
is exchanged within external ports.Firewall can be both hardware and software
but if you are working in a network it is very much necessary to guard your
system by using both types of firewall.
Types of Firewalls:
1. NGWF: Next Generation Firewalls
The Next Generation Firewall is a recent firewall technology which is used
to block modern day threats and attacks in network security.
It includes Deep Packet Inspection which inspects the data within
the packet itself.
The NGFW is meant to serve many other security areas such as
1. Blocking of apps which may pose threats to your device
2. Informing about threats from a particular website or network
2.Statefull Multilayer Inspection Firewall :
This Firewall examine the packets and allow them to enter the network based on
port , protocol and state. They examine packets to ensure that all the
communication that is taking place are coming from the trusted source.
3. Proxy Firewall :
Proxy Firewall act as an Intermediary between two end system. It serves as
a gateway from one network to another for a specific application.It provides
additional functionality by preventing direct connections from outside
the network.
4. Network Address Translation Firewalls:
Basically Network Address Translation Firewall is similar to Proxy Firewall
where it act as an Intermediary between group of computers and outside network.
Here in this type of Firewall a group of computers with different network
address is connected to the internet with single IP address. In this way the
attackers are mis-leaded by not letting them identify the IP address of
specific system thereby providing greater security against attacks .
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