What is a firewall?
Firewalls are software or hardware devices that monitor incoming and outgoing network traffic.
A firewall inspects the inbound and outbound traffic to determine whether it should be allowed to pass or if it should be blocked.
Firewalls help to protect devices connected to a network by blocking specific traffic based on the defined security rules, e.g. blocking port numbers or hiding IP Addresses.
There are two main types of firewalls:
Network-based firewalls are usually on the edge of a network. Network-based firewalls are also called hardware or physical firewalls and are installed between the network and the gateway.
Host-based firewall or software firewall is a program installed on a computer, for example Windows Firewall.
To open Windows Firewall, Press CTRL + R > type wf.msc > press enter.