How to Block Web Browsers at the Router Level
In some network administration situations, it is necessary to block Internet access from certain programs, such as Web browsers. If this is the case in your network, using your router to block Web browsers is probably the least complicated method. Web browsers only use two ports to access the Internet, so if you block those two ports in your router configuration they will not be able to connect. It is also recommended that you block four extra ports as they can be used as backup ports to the default.
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Instructions
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1
Log in to your router's configuration utility and click on the "Block Services," or similarly named, link in the navigation area.
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2
Click the "Add" button to open up a new page where you can enter in the port numbers you want to block.
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3
Select "TCP/UDP" from the "Protocol" drop-down menu, type "80" in the "Starting Port" box, type "82" in the "Ending Port" box and then click "Add."
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4
Repeat steps 2 and 3 again, this time typing "443" in the "Starting Port" and "Ending Port" boxes.
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5
Repeat the same steps again, this time typing "8080" in the "Starting Port" and "Ending Port" boxes.
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Repeat steps 2 and 3 one more time, this time typing "8090" in the "Starting Port" and "Ending Port" boxes.
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Click the "Apply" or "Save" button, depending on what kind of router you have, to finish blocking the ports. Web browsers will now be blocked from accessing the Internet on all connected computers.
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