What is Firewall? Definition and Meaning of Firewall
Definition and Meaning of Firewall – The Firewall is termed as an application that prevents the unauthorized intruders to access the private network. It can be a combination of software and hardware helping to make the local computer systems safe.
Intranets that are vulnerable to outside attacks use the software which goes a long way in providing a higher degree of protection. Firewall incorporates the capacity to block the traffic from the internet addresses that are sending a malicious virus to the server. It is a well-known fact that the application implements detailed authentication certifications to ward off the intruders in an impeccable manner.
Hardware Firewall can be purchased in the form of standalone product that is embedded in the broadband routers. The majority of routers are equipped with four network points but customization can be carried out without any hassles. The software application has numerous features that can be configured as per the desires and the preferences of the users. The Firewall plays a very important role in preventing miscreants from taking control of the computer system from remote locations.
The application uses various techniques to ensure safety and security of the intranet. For instance, packet filtering rules can be incorporated into the system based on the user defined rules. You can customize the security and help to protect the information in an easy and hassle free manner. Although people use packet filtering, it is quite vulnerable to IP spoofing which can be performed with the help of proxy servers.
Application level gateway is another technology that is used by the security software. There are many CRM systems with important data that has to be protected from the hackers. FTP and telnet are the two utilities that can be very effective in blocking virus attacks however they can slow down the speed of the system network by many notches.
Another option to implement the security is circuit level gateway that can be invoked when the TCP or UDP-based communications takes place with the intranet. Installing the protection mechanism depends on the requirements and the specifications of the clients. After the initiation of the connection, packets can easily be transmitted between the hosts without further authentication. It not only provides security but also ensures that the performance is not degraded.
Proxy server technology is used to create the wall of security around the local area network. It is responsible for intercepting the messages that are entering and leaving the network. It masks the true internet address and communicates with the outside world through the public IP.