Firewalls provide an important logging and auditing function often they provide summaries to the admin about what type/volume of traffic that has been processed through it. More sophisticated firewalls block traffic from the outside to the inside, but permit users on the inside to communicate a little more freely with the outside.įirewalls are also essential since they can provide a single block point where security and audit can be imposed.
This helps prevent "hackers" from logging into machines on your network. Generally, firewalls are configured to protect against unauthenticated interactive logins from the outside world. All data entering or leaving the Intranet pass through the firewall, which examines each packet and blocks those that do not meet the specified security criteria. Firewalls are frequently used to prevent unauthorised Internet users from accessing private networks connected to the Internet. Firewalls can be implemented in both hardware and software, or a combination of both. A firewall is simply a system designed to prevent unauthorised access to or from a private network.
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