Firewalls are a security tool used to protect computers from unauthorized access. Firewalls are classified into three types: network, host, and individual.
Network firewalls protect computers on a network from unauthorized access by blocking connections from unauthorized computers. Host firewalls protect individual computers on a network by blocking connections from unauthorized computers and by allowing authorized computers to connect to the network.
Individual firewalls protect individual users by blocking connections from unauthorized computers and by allowing authorized computers to connect to the user’s computer. .
There are three types of zones in a firewall: Inbound, Outbound, and DMZ.
Inbound zones protect computers from unauthorized access by allowing connections from authorized computers. Outbound zones protect computers from unauthorized access by allowing connections to the network.
DMZ zones protect computers from unauthorized access by allowing connections from the network and from authorized computers.
Inbound zones are divided into two types: pre-shared and public. Pre-shared zones allow authorized computers on a network to share files and printers.
Public zones allow anyone on the network to access the computer.
Outbound zones are divided into three types: local, remote, and DMZ. Local zones allow connections from authorized computers on the same network.
Remote zones allow connections from authorized computers on remote networks. DMZ zones allow connections from authorized computers on the network and from authorized computers on other networks.
