Computer Security

Firewalls

Any of a number of security schemes that prevent unauthorized users from gaining access to your computer or computer network, or using your computer to gain unauthorized access to the internet. A firewall can be a hardware device or a software program. A physical device is preferred because a software firewall can be shut down by unauthorized programs such as viruses, worms and trojans.

Software Firewalls

There are several software firewalls that the home user can use in addition to a hardware firewall. Typically, your anti-virus vendor can sell you firewall software. I recommend staying with the same vendor (Norton/Symantec, McAfee) and not mix and match. One product that is also highly recommended is ZoneAlarm.

Hardware Firewalls

The hardware firewall connects between your high-speed modem and your computer or network. Hardware firewalls can be wired or wireless, and can also function as a router (to connect several computers) and/or print server. Here is a sampling of wireless firewalls (click on the brand name to go to the website for more models, including wired ones):

For security reasons, a wireless device must be able to disable SSID broadcasts, i.e., not advertise your network to your neighbourhood.

Links

• Firewalls FAQ
• Home Computer Security
• Home Network Security
• SecurityFocus: Personal Firewalls and Your First Defense
• SANS: Personal Firewalls – Protecting the Home Internet User and Firewalls & Perimeter Protection
• FirewallGuide: Internet Security Overview and Introduction