What is a firewall?

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A firewall is a protective barrier that helps block access to the data on your computer or network by unauthorized persons or programs. Firewalls are an important component of an overall data protection strategy.

Typically, firewalls are installed at each connection point to the Internet and follow a set of rules in determining what communications to allow and what to block. The rules can control the communications based on file name, by Internet address, by individual ports on your computer, or by the communication protocol used. Firewalls are configurable to allow or disallow communications through any of these channels.

Point of Sale uses a common communication protocol, called TCP/IP, for connecting workstations to your company data and for connection to the Internet for certain features. Some firewalls, including the firewall included with Windows XP, will block this communication using their default rules and must be configured to work with Point of Sale.

Implementing a comprehensive data protection strategy

Configuring firewalls

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