Firewall Types and Their Usability

In this highly sophisticated era, every computer device is duly connected with a global network called internet. Not only the various benefits that we get from the internet connection with our PC or laptop, but also we must be ready with various crime space available in cyberspace. Therefore, it takes a device that serves to filter anywhere that is allowed to connect with the computer we have. If you want to see more info about firewall you can visit Specialised Security Systems Co.


What is a Firewall?


In our language, Firewall means a fire wall that functioned as a device, whether it’s software or hardware to secure your computer system by controlling network traffic. In this case, the firewall will grant permission in the traffic between networks that are known to be secure. Conversely, the firewall will not permit if the traffic is unsafe. Therefore, the need for a firewall is inevitable for you or a company that is legal and has access to the virtual world. This is what will provide comprehensive protection on digital devices from hacker attacks or crackers who intend evil to steal your important data.

The Firewall Types You Need to Know


Seeing how needed the firewall, the variety also varies according to user needs. Among them, there are types of firewalls that you need to know as a virtual world activist. The seven types we describe clearly below.

Packet Filter


This type of firewall is the first type of the most simple. This one firewall is a computer that is equipped with two Network Interface Card (NIC) which functions to filter various incoming packets. Generally, this device is known as packet-filtering router.

Circuit Level Gateway


The next type of Circuit Level Gateway. This type generally some component of a proxy server. Not only that, the firewall operates at a higher level in the OSI reference model than the Packet Filter Firewall type. This firewall precisely works on the session layer (session layer). The modification of this type of firewall is quite useful for anyone who wants to hide information relating to protected networks, although this type of firewall does not filter the various individual packets in a connection.