https://github.com/jdhitsolutions/dnssuffix

A set of PowerShell tools for managing the computer's primary DNS suffix.
https://github.com/jdhitsolutions/dnssuffix

dns-suffix powershell powershell-module registry

Last synced: 3 months ago
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A set of PowerShell tools for managing the computer's primary DNS suffix.

• Host: GitHub
• URL: https://github.com/jdhitsolutions/dnssuffix
• Owner: jdhitsolutions
• License: mit
• Created: 2018-01-29T21:07:20.000Z (almost 8 years ago)
• Default Branch: main
• Last Pushed: 2025-06-19T21:18:02.000Z (7 months ago)
• Last Synced: 2025-07-04T23:14:21.014Z (7 months ago)
• Topics: dns-suffix, powershell, powershell-module, registry
• Language: PowerShell
• Size: 34.2 KB
• Stars: 19
• Watchers: 3
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: changelog.md
  • License: license.txt

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README

          
# DNSSuffix

[![PSGallery Version](https://img.shields.io/powershellgallery/v/DNSSuffix.png?style=for-the-badge&label=PowerShell%20Gallery)](https://www.powershellgallery.com/packages/DNSSuffix/) [![PSGallery Downloads](https://img.shields.io/powershellgallery/dt/DNSSuffix.png?style=for-the-badge&label=Downloads)](https://www.powershellgallery.com/packages/DNSSuffix/)

## Installation

Install this module from the PowerShell Gallery.

```powershell

Install-PSResource -Name DNSSuffix

```

Even though the module isn't explicitly supported in PowerShell 7, there is no reason it shouldn't work. The module will require a Windows system.

## Overview

This PowerShell module has two simple commands that work with the registry to either get or set the primary DNS suffix of a computer. This is __not__ the value you can configure on a per network adapter configuration. Instead this is the setting you see when you go into Advanced System properties to change the computer name. When you click the More... button you get a form like this:

![Set DNS Suffix](./images/system1.png)

This value is maintained in the registry under `HKLM:\system\CurrentControlSet\Services\tcpip\parameters` where you must change the `Domain` and `NV Domain` properties. You can also configure whether to synchronize the DNS suffix with domain member ship changes. The commands in this module allow you to set and get those values using PowerShell remoting.

```powershell

PS C:\> Set-PrimaryDNSSuffix Company.pri -computername SRV1,SRV2 -SynchronizeSuffix

```

Modify the primary DNS suffix on remote computers to `Company.pri`.

```powershell

PS C:\> Get-PrimaryDNSSuffix -computername SRV1,SRV2

ComputerName      : SRV1

Domain            : Company.Pri

NV Domain         : Company.Pri

SynchronizeSuffix : True

ComputerName      : SRV2

Domain            : Company.Pri

NV Domain         : Company.Pri

SynchronizeSuffix : True

```

The changes should take effect immediately, but you may need to restart the computer for some applications to recognize the new DNS suffix.