4.1 firewall types

firewall that filters communications based on source and destination IP addresses.

network layer firewall

firewall that filters communications during transport based on source and destination ports as well as connection states

transport layer firewall

firewall that filters traffic based on an application, program, or service

application layer firewall

firewall that filters traffic based on the user, device, role, application type, or threat profile.

context aware layer firewall

firewall that filters web content requests such as media types, domain names, and URLs.

proxy server

firewall placed in front of web servers that protect, hide, offload, and distribute access to web servers

reverse proxy server

firewall hides IP addresses of network hosts.

network address translation

firewall that filters ports and system service calls on a single operating system.

host-based firewall

a small network of computers requiring internet access on a single internet connection is an example of

network address translation

example of a firewall that blocks access to applications running other devices on the same network.

host-based firewall

in this scenario the firewall type prevents users from accessing certain URLs

proxy server.