A computer firewall is a system designed to protect your computer from unauthorized access or attacks. Firewalls can be either hardware or software-based, and can be either host-based or network-based. Host-based firewalls are installed on individual computers, while network-based firewalls are installed on network routers or gateways.

Firewalls work by blocking or allowing traffic to and from your computer based on a set of rules or policies. These rules can be based on the source or destination IP address, the type of traffic, the port number, or the application.

Firewalls are an important line of defense against online threats, and …