A firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s previously established security policies.

It’s also known as a security mechanism that prevents unwanted access to private data on your network.

Firewalls also protect systems from harmful malware by establishing a barrier between trusted internal networks and untrusted external networks.

Firewalls provide protection against outside cyber attackers by shielding your computer or network from malicious or unnecessary network traffic.

Firewalls can also prevent malicious software from accessing a computer or network via the internet.

Benefits of a firewall include preventing hacking, stopping spyware, promoting privacy and monitoring network traffic.