2022-05-02 21:13:16 +02:00
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<#
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.SYNOPSIS
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Checks DNS server
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.DESCRIPTION
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2022-05-03 08:14:22 +02:00
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This PowerShell script checks the speed of public DNS server.
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2022-05-02 21:13:16 +02:00
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.EXAMPLE
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PS> ./check-dns-server
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.LINK
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https://github.com/fleschutz/PowerShell
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.NOTES
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Author: Markus Fleschutz | License: CC0
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#>
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2022-05-07 16:02:49 +02:00
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function CheckDNS { param($Name, $PriIPv4, $SecIPv4)
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2022-05-02 21:13:16 +02:00
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$StopWatch = [system.diagnostics.stopwatch]::startNew()
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2022-05-07 16:02:49 +02:00
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$null = (nslookup whitehouse.gov $PriIPv4)
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[int]$PriIPv4Elapsed = $StopWatch.Elapsed.TotalMilliseconds
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$StopWatch = [system.diagnostics.stopwatch]::startNew()
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$null = (nslookup whitehouse.gov $SecIPv4)
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[int]$SecIPv4Elapsed = $StopWatch.Elapsed.TotalMilliseconds
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" `"$Name`"; `"$PriIPv4`"; `"$PriIPv4Elapsed ms`"; `"$SecIPv4`"; `"$SecIPv4Elapsed ms`"; "
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2022-05-02 21:13:16 +02:00
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}
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try {
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2022-05-03 08:14:22 +02:00
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"Checking speed of public DNS server..."
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2022-05-07 16:02:49 +02:00
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" `"Company`"; `"IPv4 primary`"; `"Latency in ms`"; `"IPv4 secondary`"; `"Latency in ms`"; "
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CheckDNS "Cloudflare" 1.1.1.1 1.0.0.1
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CheckDNS "Cloudflare with malware blocklist" 1.1.1.2 1.0.0.2
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CheckDNS "Cloudflare with malware+adult blocklist" 1.1.1.3 1.0.0.3
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CheckDNS "DNS.Watch" 84.200.69.80 84.200.70.40
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CheckDNS "FreeDNS Vienna" 37.235.1.174 37.235.1.177
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CheckDNS "Google Public DNS" 8.8.8.8 8.8.4.4
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CheckDNS "Level3 one" 4.2.2.1 4.2.2.1
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CheckDNS "Level3 two" 4.2.2.2 4.2.2.2
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CheckDNS "Level3 three" 4.2.2.3 4.2.2.3
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CheckDNS "Level3 four" 4.2.2.4 4.2.2.4
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CheckDNS "Level3 five" 4.2.2.5 4.2.2.5
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CheckDNS "Level3 six" 4.2.2.6 4.2.2.6
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CheckDNS "OpenDNS Basic" 208.67.222.222 208.67.220.220
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CheckDNS "OpenDNS Family Shield" 208.67.222.123 208.67.220.123
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CheckDNS "OpenNIC" 94.247.43.254 94.247.43.254
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CheckDNS "Quad9 with malware blocklist, with DNSSEC" 9.9.9.9 9.9.9.9
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CheckDNS "Quad9, no malware blocklist, no DNSSEC" 9.9.9.10 9.9.9.10
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CheckDNS "Quad9, with malware blocklist, with DNSSEC, with EDNS" 9.9.9.11 9.9.9.11
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CheckDNS "Quad9, with malware blocklist, with DNSSEC, NXDOMAIN only" 9.9.9.12 9.9.9.12
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CheckDNS "Verisign Public DNS" 64.6.64.6 64.6.65.6
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exit 0 # success
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} catch {
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"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
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}
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