2021-09-27 10:38:12 +02:00
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<#
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2021-07-13 21:10:02 +02:00
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.SYNOPSIS
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2021-12-01 09:57:36 +01:00
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Checks the DNS resolution
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2021-10-04 21:29:23 +02:00
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.DESCRIPTION
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2022-09-08 16:43:32 +02:00
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This PowerShell script checks the DNS resolution using frequently used domain names.
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2021-07-13 21:10:02 +02:00
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.EXAMPLE
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2021-12-01 09:57:36 +01:00
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PS> ./check-dns
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2021-07-13 21:10:02 +02:00
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.LINK
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https://github.com/fleschutz/PowerShell
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.NOTES
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2022-05-23 12:51:58 +02:00
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Author: Markus Fleschutz | License: CC0
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2020-12-29 15:14:21 +01:00
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#>
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2020-09-29 20:05:52 +02:00
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2020-10-05 13:12:12 +02:00
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try {
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2022-09-08 20:39:46 +02:00
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"⏳ Step 1/2 - Reading table from Data/domains.csv..."
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$Table = Import-CSV "$PSScriptRoot/../Data/domains.csv"
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2022-09-08 20:23:04 +02:00
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$NumRows = $Table.Length
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2020-12-14 15:06:09 +01:00
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2022-09-08 20:39:46 +02:00
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"⏳ Step 2/2 - Resolving $NumRows domains..."
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2022-09-08 16:43:32 +02:00
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$StopWatch = [system.diagnostics.stopwatch]::startNew()
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2022-05-22 22:35:21 +02:00
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if ($IsLinux) {
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2022-09-08 16:43:32 +02:00
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foreach($Row in $Table) { $null = dig $Row.Domain +short }
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2022-05-22 22:35:21 +02:00
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} else {
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2022-09-08 16:43:32 +02:00
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foreach($Row in $Table) { $null = Resolve-DNSName $Row.Domain }
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2020-10-05 13:12:12 +02:00
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}
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2022-09-08 16:43:32 +02:00
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2022-09-08 20:23:04 +02:00
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[float]$Elapsed = $StopWatch.Elapsed.TotalSeconds
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$Average = [math]::round($NumRows / $Elapsed, 1)
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2022-09-09 09:27:12 +02:00
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if ($Average -gt 200.0) { $Rating = "excellent"
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} elseif ($Average -gt 100.0) { $Rating = "quite good"
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} elseif ($Average -gt 10.0) { $Rating = "good"
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} else { $Rating = "poor"
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}
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"✔️ $Average DNS domain lookups per second - $Rating"
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2021-09-27 10:09:45 +02:00
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exit 0 # success
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2020-12-09 10:30:55 +01:00
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} catch {
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2022-04-13 12:06:32 +02:00
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"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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2020-12-09 10:30:55 +01:00
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exit 1
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2022-09-08 16:43:32 +02:00
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}
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