A firewall is a program or device that is used to control access to a computer or network. It sits between a restricted system and the Internet, so all traffic in or out must flow through it.
Firewalls work like security guards to protect a computer. The firewall uses policies set by the firewall’s user to determine whether to allow the computer to access sites or other computers on the Internet.
If a computer has no firewall, nothing is controlling who and what can enter and leave. When you connect a computer to a network, including the Internet, your system can be a target. Some things that can happen include:
Firewalls can help prevent attacks from getting through and harming your computer.
The Interhack company of Ohio provides excellent information about firewalls with this series of Frequently Asked Questions.
Check our calendar for C-SAFE classes and important training events. Subscribe in your Google calendar.