Over the last few years, security threats have grown and altered dramatically and so have the defences. Traditional firewalls, installed over three years ago, are often not best suited for current threats and don’t protect against a number of newer threats.
A firewall is a system designed to prevent unauthorised access to or from a private computer network. Firewalls are frequently used to prevent unauthorised Internet users from accessing private networks connected to the Internet (often described as intranets). 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. BIOS: The Essential IT Guide
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