The firewall is another way or a profound manner to safeguard the internal network to the Internet. Now most of the companies which are emerging have opted this method of computing, infact fortune companies have also chosen this way. From where does the term inspired? The term “firewall” meaning a wall which is purposeful to restrict a fire within the lines of the adjacent buildings. Later this similar structure was implemented as a metal sheet spreading in the engine compartment of vehicles or in the passenger compartments of aircraft. This later got inspired and implemented in the late 1980s to the technological world where the internet was emerging globally. What is a next generation firewall? In computing language a firewall is a network security that scans the incoming and outgoing network traffic and allows or prevents data packets on the basis of pre-planned security rules. It fundamentally creates a blockade between trusted internal networks and untrusted external networks such as the Internet.
Implementing in next-generation
They are implemented in both corporate and customer settings. The security information event management (SIEM) in addition with other cyber security devices may be implied to prevent or safeguard against external threats, whereas it may be installed within the organization’s network to create segmentation and barricade the internal threats. They also inspect the important logging and audit functions. Of course, they keep a track of records on events which are used by the administrators to identify the modules and improvise the set of rules. The rules must be updated frequently to maintain the benefits of cyber security threats. The companies establish new threats and develop to solve the troubles as quickly as possible.
Categories of Firewalls
They are neither categorised into the way of filtered data nor by the device they protect.
When categorising under the system they protect, they are classified into two types, they are:
- Network-based firewalls: They protect the entire network and its security. These are hardwares.
- Host-based firewalls: They guard specific or individual systems. They are mostly software.
While categorising under the filter method, the essential types are:
- Packet-filtering firewalls: The term “packet” here refers to pieces of data which are formatted into internet transfer. It is the commonly used firewalls which prohibits the passing if they do not match the framed security rule. These are further classified into (1) Stateless and (2) Stateful firewalls.
- Next generation firewalls (NGFW): They are the combinations of advanced security software and system bundled. The NGFWs assemble three vital benefits: traditional capabilities, application awareness and IPS.
- Network address translation (NAT): They permit multiple systems with independent network addresses to connect the internal by single IP address making the individual IP address hidden. This helps in resulting in the attackers to fail in tracking or scanning the IP addresses and provides highly secured platforms.
When any of these firewalls coincide with other devices it is termed as Unified Threat Management (UTM).
How a firewall cannot protect your network
Though it is a highly secured platform, they fail to protect under certain situations. Here is an instance a firewall will not necessarily protect or prevent the data that you send over through Internet applications such as Simple Mail Transfer Protocol (SMTP), File Transfer Protocol (FTP), and Telnet. Until you encrypt these data anyone in through the transfer of destination can access.