A firewall is a network security
Firewall A firewall is a network security device that separates a trusted internal network from an external network that is considered untrusted, such as the Internet. It regulates incoming and outgoing network traffic based on pre-configured security rules. Firewalls play a central role in protecting networks from unauthorized access, malicious activity, and potential threats, and can exist as hardware, software, Software as a Service (SaaS), or a public or private (virtual) cloud. Firewalls inspect network packets to implement security policies, effectively preventing unauthorized users and potentially harmful data from entering or leaving the network. A firewall primarily acts as a gatekeeper, checking every network packet and deciding whether to allow or block the packet based on pre-configured rules. This ensures that only traffic that is deemed safe and legitimate passes through the firewall. In addition to these core functions, today's next-generation firewalls...
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