A firewall is a community safety system that screens and controls incoming and outgoing community site visitors based mostly on predetermined safety guidelines. It establishes a barrier between a trusted inner community and untrusted exterior networks, such because the Web.
Firewalls have turn into important for safeguarding networks from unauthorized entry, malicious software program, and different cyber threats. They are often carried out in each {hardware} and software program, and they are often configured to permit or block particular forms of site visitors based mostly on IP addresses, port numbers, and different standards.
