ROLE OF FIREWALL IN INTERNET SECURITY

A Firewall is a network security system that prevents unauthorized access to a private network and controls the network traffic based on the security policy. It acts as a barrier between secured intranet and internet. This security system can be implemented in both hardware and software. The major benefit of this security system is that every message passing or leaving the intranet is thoroughly checked and those messages not fulfilling the security criteria are blocked.

Software firewalls protect computer networks from malicious packets that can reach LAN card and transfer data to unauthorized persons. With the growing demand for having security system for the computers many operating system developing companies are providing in-built firewalls with the operating system. Further, hardware firewalls are difficult in configuration, tough to manage and are very costly. Large organizations having multiple computers make use of hardware based security system. Another advantage of using internet security system is that it can block unsuitable material as per the network policy.

Implementing web security on computers can help in monitoring suspicious activity and can block malicious attacks from hackers. Furthermore, internet security system can hide the identity of your computer in order to stop any intrusion attempts by unauthorized users. Network based security system allows remote access of private networks having authentication certificates by secured logins. You can customize router firewall to block specific ports so that software programs cannot access or connect to the internet. Moreover internet security system blocks trojan horses which can attach on your file and send it outside your network.