Many companies and organizations have connected their local area networks, wide area networks, and the Internet together in what is commonly referred to as a global area network. While extremely beneficial in terms of communication and access to information, this interconnectivity can expose a company's network and mission critical information to unauthorized entry and access. A firewall is used to prevent unauthorized accesses.
Firewalls are security devices used to protect companies from unauthorized access to their servers.
Many companies use firewalls to control access to their networks and proprietary information. The firewall's role is to ensure that all communication between an organization's network and the Internet conform to the organization's security policies. During the installation process, RealPlayer looks for HTTP Proxy information setup for Netscape Navigator or Microsoft Internet Explorer and uses that information to setup the RealPlayer Proxy information. In the Preferences window, click the Transport tab. Click the Automatically Select Most Efficient Transport option.