Success with a firewall depends on what data traffic you allow to pass through your
firewall to and from the Internet, with a few basic examples.
This project will take you through the steps of making your internal network safe
from if not completely invisible to the Internet at-large, and allowing only certain types
of application data (for instance, remote control of computers on your network or running
your own web server) into your local network from the Internet.
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74 Project 11
Step 1: Find Your Router??™s Firewall Settings
Access your router??™s configuration web pages by typing your router??™s IP address into
your browser??™s Address bar??”in our example from Project 10, the router IP address
is 192.168.2.1. Among the available menu items should be a selection to configure the
router, or directly access the firewall settings. In our case the firewall selections are
clearly visible along the left menu. Clicking Firewall takes you to a basic configuration
selection??”whether or not you want to enable or disable the firewall??”as shown
in Figure 11-1. Normally you want the firewall enabled, but you may have to disable
it if you??™re working with a support technician to troubleshoot problems in your network
or Internet connections.
Figure 11-1
Controlling whether
your router??™s firewall is
enabled
Configuring Firewall Protection for Your Network 75
With the firewall feature disabled, all of the computers on your internal network
are vulnerable to almost anything and everything floating around the Internet.
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