What are ‘firewalls’?
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A firewall is a network security system responsible for managing network traffic. It uses a set of security rules to prevent remote access and content filtering. Firewalls protect the systems or networks from viruses, worms, malware, etc. Firewalls are usually of two types –
Physical – A physical firewall or hardware firewall is a physical device that sits between the external network and the server. They analyze incoming traffic and filter out any threats to the device. Widely used in institutions and large companies.
Logical – A logical or software firewall can exist anywhere on the subnet and protects hosts anywhere without rewiring. They only protect the computer on which they are installed, and in many cases, they are integrated into the operating system.