The FriendlyNET FR3000 series routers have a built-in firewall that is automatically activated when you connect your computers. It cannot be deactivated, but it features a high level of customization. If you are not familiar with TCP/IP, NAT, and UDP ports, you may wish to view the following FAQ items before you configure your firewall: "What is an IP Address?", "What is the difference between a hub, switch and router?", and "What is a firewall and how does it work?".

1. Accessing the Popular Applications menu:

1. Start your web browser. Type http://192.168.123.254 Into your browser's address or location field and press Enter.
2. In a few moments you'll see the Login screen for the router. Enter admin (the default password) and click Log in.
3. Click the Security button from the top of the page.
4. Scroll down until you see Popular Applications. It should look similar to this:

2. Configuring Popular Applications:

Popular Applications acts similarly to Port Access Controls. It lets you define open certain UDP ports to comunicate with the computers connected to the router. This is done by defining trigger ports and incoming ports. Trigger ports are initially issued by the application. When the trigger port is detected, the inbound packets to the specified port numbers are allowed to pass through the firewall. The port is open for 60 seconds.

You can set some popular applications automatically by selecting the application's drop-down menu.

When you are done setting up your popular applications, click the Save button to apply the settings. Be sure to check the Enable checkbox.

The following syntax conventions can be used for entering port and host numbers:

• Individual: 1, 2, 3 (Ports, 1, 2, and 3)
• Spanned: 1-8 (Ports 1, 2, 3, 4, 5, 6, 7, and 8)
• Mixed 1, 5, 6-9 (Ports 1, 5, 6, 7, 8, and 9)

Here are some sample configurations:

Application Trigger in Ports Napster 6699 6699 Quicktime 4 Client 554 6970-32000 Real Audio 7070 6970-7170 Windows 2000 Terminal Server 3389 3389

Click here for a detailed list of ports for popular applications

Click here for a listing of TCP/UDP ports 0-100