Installing the Windows 3.0.x Dynamic Update Client (DUC)

This guide is going to show you how to setup the Dynamic Update Client for Windows 3.0x and explain the additional preference settings that are available.

Step 1: Go to and download the Windows version of the DUC. If you are attempting to install the No-IP DUC version 4.x, please click here.

For this guide I used “Save File”.


Step 2: Open the location you saved the downloaded “ducsetup” to and double-click on the “ducsetup” icon. Read the License Agreement and check the box if you agree to the EULA and the TOS, then click “Next”.

Step 3: Select where you wish to install it. The default installation directory will be used automatically. If you do not wish to make changes select “Next”.

You can choose to “Not Create Shortcuts” but I would recommend just clicking “Install” which will be easier for locating and finding your DUC.

Step 4: Once the installation has finished click on the “Start” button and then “All Programs”. Find the “No-IP DUC” folder,  expand it and click the “DUC 3.0” icon.

You will be prompted to login. Enter the credentials you used when you created your No-IP account. If you have not done so follow the Getting Started Guide.


Step 5: When logging in for the first time you are asked to select the host or group that you want this client to be associated with. What this means is the host that you select will be updated with the public IP address of the network that the DUC is currently on. You can edit this any time after you save the settings by clicking “Select Hosts” on the DUC v3.0.4.


Step 6: After you have selected your hosts and saved your settings you should get three green check marks. Three green check marks means everything is working correctly and updating. Your host will now be updated if your IP address changes.


Note: If you are not running the DUC and your IP address changes No-IP is unable to detect a change. You need to be sure your computer and DUC are running at all times if you want your host to always be updated to the correct IP address. One feature that will help insure that your DUC always starts is to go to “File” on the DUC and click “Preferences” then check “Run on startup”.


If you check “Run as a system service” it will only work if you are running Windows NT/2000/XP/2003/Vista/2008.

Checking “Use Alternative IP detection method” can help if your IP is not being detected correctly or it is detecting the wrong IP address. Along with “Use alternative IP detection method” is “Network Adapter”, it is best to leave this setting set to “Windows Default” changing it can cause detection failing.