Using XP as a router

by Mitch Tulloch [Published on 29 March 2006 / Last Updated on 29 March 2006]

A cheap and easy way of using an XP box as a router.

A cheap and easy way of adding a router to your network is to use a surplus PC with Windows XP Professional installed on it. Just install an additional network card in the box and then configure the registry setting below and Presto! Your XP box becomes able to route (forward) IP packets from one interface to another.

Open Regedit and navigate to:


Find the following registry value:


Set this value to 1 to enable IP routing on the box.

After doing this, reboot the machine. You may also need to disable Windows Firewall on the machine.

See Also

The Author — Mitch Tulloch

Mitch Tulloch is a well-known expert on Windows Server administration and cloud computing technologies. He has published over a thousand articles on information technology topics and has written, contributed to or been series editor for over 50 books.

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