mqsft.dnsexternal.psm1
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# ============================================================================== # mqsft.dnsexternal.psm1 - AUTO-GENERATED by Create_Module_0_0_5.ps1 v0.0.5 # ------------------------------------------------------------------------------ # Module Version : 1.0.3 # Script Version : 0.0.5 # Built : 2026-02-24 17:16:49 # Source : C:\Modules\functions\mqsft.dnsexternal # # DO NOT EDIT THIS FILE DIRECTLY. # Edit source files in C:\Modules\functions\mqsft.dnsexternal and re-run Create_Module_0_0_5.ps1. # ============================================================================== Set-StrictMode -Version Latest # --- Source: Monitor-NameServerChange.ps1 -------------------------------- function Monitor-NameServerChange { <# .SYNOPSIS Monitors a domain for DNS nameserver (NS) record changes. .DESCRIPTION Continuously queries the specified domain for NS records and compares them against the initial baseline set retrieved at startup. The function will loop at a defined interval until: - A change in nameservers is detected (returns $true), or - The optional maximum number of checks is reached (returns $false). Useful for: - Tracking DNS propagation - Monitoring domain migrations - Validating registrar or hosting changes - Change verification during cutovers .PARAMETER Domain The domain name to monitor (e.g. example.com). This parameter is mandatory. .PARAMETER CheckInterval Number of seconds between DNS checks. Default value is 10 seconds. .PARAMETER MaxChecks Maximum number of checks before stopping. Default is 0, which means run indefinitely until a change is detected. .PARAMETER ShowProgress If specified, displays the current nameserver values during each check. .EXAMPLE Monitor-NameServerChange -Domain example.com Monitors example.com every 10 seconds until a nameserver change is detected. .EXAMPLE Monitor-NameServerChange -Domain example.com -CheckInterval 30 -ShowProgress Checks every 30 seconds and displays current NS records each cycle. .EXAMPLE Monitor-NameServerChange -Domain example.com -MaxChecks 20 Checks up to 20 times, then exits if no change is detected. .OUTPUTS System.Boolean Returns: - $true if a nameserver change is detected - $false if maximum checks are reached or initial lookup fails .NOTES Author: Mike Quick Requires: Resolve-DnsName (PowerShell 4.0+) Intended for DNS monitoring and change validation scenarios. #> [CmdletBinding()] param( [Parameter(Mandatory=$true)] [string]$Domain, [Parameter(Mandatory=$false)] [int]$CheckInterval = 10, [Parameter(Mandatory=$false)] [int]$MaxChecks = 0, [Parameter(Mandatory=$false)] [switch]$ShowProgress ) Write-Host "Starting nameserver monitoring for: $Domain" -ForegroundColor Cyan Write-Host "Check interval: $CheckInterval seconds" -ForegroundColor Cyan Write-Host "" # Get initial nameservers Write-Host "Getting initial nameservers..." -ForegroundColor Yellow try { $nsRecords = Resolve-DnsName -Name $Domain -Type NS -ErrorAction Stop $baselineNS = $nsRecords | Where-Object { $_.Type -eq 'NS' } | Select-Object -ExpandProperty NameHost | ForEach-Object { $_.TrimEnd('.').ToLower() } | Sort-Object -Unique } catch { Write-Host "ERROR: Could not retrieve initial nameservers for $Domain" -ForegroundColor Red Write-Host "Error: $_" -ForegroundColor Red return $false } if (-not $baselineNS) { Write-Host "ERROR: No nameservers found for $Domain" -ForegroundColor Red return $false } Write-Host "Baseline nameservers (watching for changes):" -ForegroundColor Yellow $baselineNS | ForEach-Object { Write-Host " - $_" -ForegroundColor White } Write-Host "" Write-Host "Monitoring for changes..." -ForegroundColor Cyan Write-Host "" $checkCount = 0 $startTime = Get-Date # Monitoring loop while ($true) { $checkCount++ $currentTime = Get-Date $elapsed = $currentTime - $startTime # Query current nameservers try { $nsRecords = Resolve-DnsName -Name $Domain -Type NS -ErrorAction Stop $currentNS = $nsRecords | Where-Object { $_.Type -eq 'NS' } | Select-Object -ExpandProperty NameHost | ForEach-Object { $_.TrimEnd('.').ToLower() } | Sort-Object -Unique } catch { Write-Host "[$checkCount] $(Get-Date -Format 'HH:mm:ss') - Failed to query nameservers" -ForegroundColor Red $currentNS = $null } if ($null -eq $currentNS) { # Continue on error } else { # Compare nameservers $match = ($currentNS.Count -eq $baselineNS.Count) -and ($baselineNS | ForEach-Object { $_ -in $currentNS } | Where-Object { -not $_ }).Count -eq 0 if (-not $match) { # Change detected! Write-Host "" Write-Host "SUCCESS! Nameserver change detected!" -ForegroundColor Green Write-Host "Domain: $Domain" -ForegroundColor Green Write-Host "" Write-Host "Original nameservers:" -ForegroundColor Yellow $baselineNS | ForEach-Object { Write-Host " - $_" -ForegroundColor White } Write-Host "" Write-Host "New nameservers:" -ForegroundColor Green $currentNS | ForEach-Object { Write-Host " - $_" -ForegroundColor White } Write-Host "" Write-Host "Total checks: $checkCount" -ForegroundColor Cyan Write-Host "Total time elapsed: $($elapsed.ToString('hh\:mm\:ss'))" -ForegroundColor Cyan Write-Host "Change detected at: $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss')" -ForegroundColor Cyan return $true } else { $status = "[$checkCount] $(Get-Date -Format 'HH:mm:ss') - No change detected" if ($ShowProgress) { Write-Host $status -ForegroundColor Gray Write-Host " Current: $($currentNS -join ', ')" -ForegroundColor DarkGray } else { Write-Host $status -ForegroundColor Gray } } } # Check if max checks reached if ($MaxChecks -gt 0 -and $checkCount -ge $MaxChecks) { Write-Host "" Write-Host "Maximum checks ($MaxChecks) reached without detecting change" -ForegroundColor Red Write-Host "Total time elapsed: $($elapsed.ToString('hh\:mm\:ss'))" -ForegroundColor Cyan return $false } Start-Sleep -Seconds $CheckInterval } } |