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 ...

Following are the different methods used to provide firewall protection, and several of them are often used in combination. See firewall. Allows one IP address, which is shown to the outside world, to ...