Learn how a firewall filters out cyber-threats, while still letting you access everything you want to look at online. When you purchase through links on our site, we may earn an affiliate commission.

Software installed in a user's computer that offers protection against unwanted intrusion and attacks coming from the Internet. Personal firewalls are available from numerous security vendors, and ...

A device that provides firewall protection for a network. It includes all the necessary hardware and software in a self-contained package that plugs in between the two networks being isolated. Most ...