DNS - Aging and Scavenging - Configure Intervals

Summary

This is an RMM implementation of the agnostic script Set-DNSServerScavengingSettings. It enables DNS scavenging and optionally allows you to set the interval for scavenging, 'no refresh', and refresh.

Sample Run

Dependencies

Set-DNSServerScavengingSettings

User Parameters

Name	Example	Accepted Values	Required	Default	Type	Description
ScavengingInterval	7	Integers	False		Text	The scavenging process runs after X days.
NoRefreshInterval	7	Integers	False		Text	This setting controls when the DNS server rejects refresh requests from hosts and the DHCP service.
RefreshInterval	7	Integers	False		Text	This option determines when a DDNS record can be flagged for scavenging (deletion). The default value is seven days.

Task Creation

Create a new Script Editor style script in the system to implement this Task.

Name: DNS - Aging and Scavenging - Configure Intervals
Description: Enables DNS scavenging and optionally allows you to set the interval for 'scavenging', 'no refresh', and 'refresh'.
Category: Custom

Parameters

Add a new parameter by clicking the Add Parameter button present at the top-right corner of the screen.

This screen will appear.

• Set ScavengingInterval in the Parameter Name field.

• Select Text String from the Parameter Type dropdown menu.

• Click the Save button.
  

• It will ask for confirmation to proceed. Click the Confirm button to create the parameter.
  

Add another parameter by clicking the Add Parameter button present at the top-right corner of the screen.

• Set NoRefreshInterval in the Parameter Name field.

• Select Text String from the Parameter Type dropdown menu.

• Click the Save button.
  

• It will ask for confirmation to proceed. Click the Confirm button to create the parameter.

Add another parameter by clicking the Add Parameter button present at the top-right corner of the screen.

• Set RefreshInterval in the Parameter Name field.
• Select Text String from the Parameter Type dropdown menu.
• Click the Save button.
• It will ask for confirmation to proceed. Click the Confirm button to create the parameter.
  

All the parameters will look like as shown below:

Task

Navigate to the Script Editor Section and start by adding a row. You can do this by clicking the Add Row button at the bottom of the script page.

A blank function will appear.

Row 1 Function: PowerShell Script

Search and select the PowerShell Script function.

The following function will pop up on the screen:

Paste in the following PowerShell script and set the expected time of script execution to 300 seconds. Click the Save button.

# # Parameters and Globals
# # Be sure that the name of the hashtable property matches the name of the parameter of the script that you are calling.
$ScavengingInterval = '@ScavengingInterval@'
$NoRefreshInterval = '@NoRefreshInterval@'
$RefreshInterval = '@RefreshInterval@'
$Parameters = @{}
if ($ScavengingInterval -match '[0-9]') {
    $Parameters['ScavengingInterval'] = $ScavengingInterval
}
if ($NoRefreshInterval -match '[0-9]' ) {
    $Parameters['NoRefreshInterval'] = $NoRefreshInterval
}
if ($RefreshInterval -match '[0-9]') {
    $Parameters['RefreshInterval'] = $RefreshInterval
}

#region Setup - Variables
$ProjectName = 'Set-DNSServerScavengingSettings'
[Net.ServicePointManager]::SecurityProtocol = [enum]::ToObject([Net.SecurityProtocolType], 3072)
$BaseURL = 'https://file.provaltech.com/repo'
$PS1URL = "$BaseURL/script/$ProjectName.ps1"
$WorkingDirectory = "C:\ProgramData\_automation\script\$ProjectName"
$PS1Path = "$WorkingDirectory\$ProjectName.ps1"
$Workingpath = $WorkingDirectory
$LogPath = "$WorkingDirectory\$ProjectName-log.txt"
$ErrorLogPath = "$WorkingDirectory\$ProjectName-Error.txt"
#endregion
#region Setup - Folder Structure
New-Item -Path $WorkingDirectory -ItemType Directory -ErrorAction SilentlyContinue | Out-Null
$response = Invoke-WebRequest -Uri $PS1URL -UseBasicParsing
if (($response.StatusCode -ne 200) -and (!(Test-Path -Path $PS1Path))) {
    throw "No pre-downloaded script exists and the script '$PS1URL' failed to download. Exiting."
} elseif ($response.StatusCode -eq 200) {
    Remove-Item -Path $PS1Path -ErrorAction SilentlyContinue
    [System.IO.File]::WriteAllLines($PS1Path, $response.Content)
}
if (!(Test-Path -Path $PS1Path)) {
    throw 'An error occurred and the script was unable to be downloaded. Exiting.'
}
#endregion
#region Execution
if ($Parameters) {
    & $PS1Path @Parameters
} else {
    & $PS1Path
}
#endregion
if ( !(Test-Path $LogPath) ) {
    throw 'PowerShell Failure. A Security application seems to have restricted the execution of the PowerShell Script.'
}
if ( Test-Path $ErrorLogPath ) {
    $ErrorContent = ( Get-Content -Path $ErrorLogPath )
    throw $ErrorContent
}
Get-Content -Path $LogPath

Row 2: Function: Script Log

In the script log message, simply type %output% so that the script will send the results of the PowerShell script above to the output on the Automation tab for the target device.

Completed Task

Output

• Script Log