If you have a firewall installed, you will need to open it at least on the port you have configured the web server to listen on. The packet type is TCP
For XP® Users that have enabled the built in default firewall protection, you will need to open a TCP port for the network card you wish to run the web server on. This can be accomplished by opening control panel and opening the control for network connections. From here press the properties button and click the Advanced tab. At the bottom of this tab you will find an button called "Settings". Pressing the "Add" button presents the dialog box which will allow you to add a rule that will allow an entry for the WebServer.
For Experts
Sometimes you may wish to block a known IP address from accessing the web server. There is no guarantee that this will work since IP addresses can be spoofed. But it is fairly reliable since very few people understand the mechanics of spoofing.
