Add clear-dns-cache.ps1

Data/domain-names.csv

@@ -7,6 +7,7 @@ aka.ms
 alternate.de
 api.dropboxapi.com
 api.met.no
+api.serenade.ai
 api1.origin.com
 arc.msn.com
 arte.tv
@@ -18,6 +19,7 @@ banking.ing-diba.de
 bing.com
 bing.de
 bing.fr
+bitbucket.org
 blitzortung.org
 bolt.dropbox.com
 catalog.gamepass.com
@@ -113,6 +115,7 @@ settings.data.microsoft.com
 settings-win.data.microsoft.com
 sites.google.com
 slashdot.com
+speed.cloudflare.com
 speedtest.net
 ssl.gstatic.com
 stackoverflow.com
@@ -142,6 +145,7 @@ wttr.in
 www.google.com
 www.googleapis.com
 www.gstatic.com
+www.heise.de
 www.netflix.com
 www.youtube.com
 youtube.com

Scripts/clear-dns-cache.ps1

@@ -0,0 +1,26 @@
+<#
+.SYNOPSIS
+	Clears the DNS cache
+.DESCRIPTION
+	This PowerShell script clears the DNS cache of the local computer.
+.EXAMPLE
+	PS> ./clear-dns-cache
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author: Markus Fleschutz | License: CC0
+#>
+
+try {
+	$StopWatch = [system.diagnostics.stopwatch]::startNew()
+
+	$null = (ipconfig /flushdns)
+	if ($lastExitCode -ne "0") { throw "'ipconfig /flushdns' failed with exit code $lastExitCode" }
+
+	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
+	"✔️ cleared DNS cache in $Elapsed ms."
+	exit 0 # success
+} catch {
+	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}