Zone Alarm is an Internet security software suite from Zone Labs. One of the principle services offered by the suite, and also available as a free product is a software firewall. This enable users to monitor the activity that goes on between a computer and the Internet, including reports on any hostile attacks on your computer, and the exchange of data through the firewall. With the firewall capability from Zone Alarm, you will be able to select the level of security you want with a personal computer. The highest level of security will restrict access to a lot of sites while the lowest level of security will enable some insecure site visiting.