About Firewalls

Networked computers are susceptible to viruses, unwanted intrusions by hackers, and self-spreading worms that infiltrate computer systems through open network ports. Firewalls prevent these intrusions by blocking unused network ports.

Windows XP and Mac OS X have built-in firewalls. See the Windows Security page for instructions on how to turn on the Windows firewall. You can find additional information about firewalls on the Firewall FAQs page or on the websites below.

• Computer Security Resource Center
• CERT Coordination - A federally funded Internet security research and development center.
• Symantec Security Response

Getting Help

You may wish to visit Symantec's Support Site or view the Symantec Firewall FAQ page.

For questions, please contact the Customer Support Center at 213-740-5555 or send an email to consult@usc.edu.