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How to Configure a Permanent IP Address for Network Devices

Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
This article describes how to reserve Internet Protocol (IP) addresses so that Internet Connection Sharing (ICS) does not assign the IP addresses to devices that require a permanent IP address.
More information
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.
Certain network devices (such as network printers) require an IP address that does not change. To ensure that the Dynamic Host Control Protocol (DHCP) service does not assign a conflicting IP address, edit the following registry value and change the data value to
After you make this change, restart your computer. Then, set the network devices requiring a permanent IP address to an address between and

NOTE: Although altering the ICS setting described above is possible in the manner described in this article, Microsoft Product Support Services will not assist with customizing ICS IP settings beyond the default configuration.

Article ID: 230150 - Last Review: 06/22/2014 20:14:00 - Revision: 3.0

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