What is a firewall? Why do I need one for my computer?Share & Print
A firewall is a protective barrier that prevents unwanted sources such as
viruses, worms, trojans and other malicious code from accessing your computer
or network. Firewalls can be either hardware-based or software-based. These
two types of solutions can also be used in conjunction with one another.
C&IT highly recommends that you use a firewall. Newer operating systems (such
as Windows XP or Windows Vista, and Mac OS X 10.4 and above) have software-
based firewalls built-in. To configure these built-in firewalls, click the
provided links below.
- Turn Windows Firewall on or off: Turn Windows firewall on or off.
- Microsoft Windows XP with Service Pack 2 and later: How can I turn off the firewall in Windows XP Service Pack 2 or later versions?
If you have difficulties turning on your firewall or have a system not listed
above, please contact the C&IT Help Desk.