Firewall A firewall is a system that is designed to prevent unauthorized access to or from a private network. All communication between your computer and internet flows through the firewall since it lies between your computer network and the Internet. Internet connection leaves you vulnerable to hackers who want to access your financial and personal information. Some hackers may be after your high-speed connection so that they can send malicious viruses and worms, blackening your reputation. Other intruders have the power to destroy your operating system on a whim. A firewall works as a barrier, or a shield, between your computer network and internet. When you are connected to the Internet, you are constantly sending and receiving information. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria. Firewalls provide security over a number of online threats such as Remote login, Trojan backdoors, Session hijacking, DOS & DDOS attacks, viruses, cookie stealing and many more. Next-Generation Firewalls deliver superior intrusion prevention, malware protection, application intelligence and control, real-time traffic visualization and inspection for SSL encrypted sessions at the gateway by tightly integrating a patented Reassembly-Free Deep Packet Inspection engine with multi-core hardware.