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Firewall Review - Download Free ActiveDefender
| Firewall Software | ||
| Benefits | ||
| OnlineDefender Review | ||
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What is a firewall? | |
| What does a firewall do? | ||
| Who needs a firewall? | ||
| How does a firewall work? | ||
| Downloads | ||
Our tests have showed that among advanced firewall applications, ActiveDefender ranked highest overall with usability, protection, reliability, and free customer support.
What is a Firewall?
| WHAT DOES A FIREWALL DO? |  |
A computer firewall protects networked computers from intentional hostile intrusion that could compromise confidentiality or result in data corruption or denial of service. It may be a hardware device (which usually means installing lots of complicated devices which may or may not be compatible) or a software program (see Figure 1) like ActiveDefender. In either case, it must have at least two network interfaces, one for the network it is intended to protect, and one for the network it is exposed to. A network firewall sits at the junction point or gateway between the two networks, usually a private network and a public network such as the Internet. The earliest computer firewalls were simple routers. The term "firewall" comes from the fact that by segmenting a network into different physical subnetworks, they limited the damage that could spread from one subnet to another - just like firedoors or firewalls.
Figure 1: Computer with ActiveDefender
Firewall Software
Computer running firewall software to provide protection
| WHAT DOES A FIREWALL DO? | |