A firewall is a community safety system that screens and controls incoming and outgoing community visitors primarily based 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 applied in each {hardware} and software program, and they are often configured to permit or block particular varieties of visitors primarily based on IP addresses, port numbers, and different standards.
