Download powershell script
1. Enable DNS debug log on all dns-servers
- set limit for file size
- set same path
2. Install on the PC from which you run the script Logparser
3. For script you have to set
- servers
- domains
- homefolder
- files with dns debug logs
- email server (anonymous smtp)
- user email
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# Set variables
$HomeFolder = "D:\Scripts" cd $HomeFolder $LogParser = "C:\Program Files (x86)\Log Parser 2.2\LogParser.exe" $Servers = @("dc1.blogspot.com","dc2.blogspot.com","dc3.blogspot.com") $msg = new-object Net.Mail.MailMessage $msg.From = "myscript@blogspot.com" $msg.To.add("i-evgeny@blogspot.com") $msg.Subject = "DNS-query statistics" $msg.IsBodyHTML = $true $SMTPServer = "smtp.blogspot.com" $SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer, 25) $LogTime = Get-Date -Format "yyyy-MM-dd_hh-mm-ss" if (!(test-path "$HomeFolder\Logs")) {New-Item -ItemType directory -Path "$HomeFolder\Logs"} $LogFile = $HomeFolder + "\Logs\DNSParser_"+$LogTime+".log" $LogFile_top_domain = $HomeFolder + "\Logs\DNSParser_top_domain_" + $LogTime + ".log" $LogFile_top_ip = $HomeFolder + "\Logs\DNSParser_top_ip_" + $LogTime + ".log" $TempFile = $HomeFolder + "\DNSTemp.csv" $DCs_str = "" $i = 1 foreach ($d in $Servers) { if ($i -eq "1") {$DCs_str = "\\$($d)\c$\Scripts\Logs\Queries.log" } else {$DCs_str += ",\\$($d)\c$\Scripts\Logs\Queries.log"} $i++ } # Logparser query: group by query, client ip $query = """SELECT field8,CASE field16 WHEN NULL THEN field15 ELSE field16 END AS myquery INTO $($TempFile) FROM $DCs_str""" $LogParserStr = "-i:TSV -iSeparator:space -nFields:16 -headerRow:OFF -nSkipLines:30 -o:csv " + $query $LP = Start-Process -FilePath $LogParser -ArgumentList $LogParserStr -Wait -Passthru -NoNewWindow Start-Sleep -s 15 $query_top_domain = """SELECT myquery, COUNT(myquery) INTO $LogFile_top_domain FROM $TempFile GROUP BY myquery ORDER BY COUNT(myquery) DESC""" $LogParserStr = "-i:csv -o:csv " + $query_top_domain $LP = Start-Process -FilePath $LogParser -ArgumentList $LogParserStr -Wait -Passthru -NoNewWindow $query_top_ip = """SELECT Field8, COUNT(Field8) INTO $LogFile_top_ip FROM $TempFile GROUP BY field8 ORDER BY COUNT(field8) DESC""" $LogParserStr = "-i:csv -o:csv " + $query_top_ip $LP = Start-Process -FilePath $LogParser -ArgumentList $LogParserStr -Wait -Passthru -NoNewWindow # Transformation query $result_top_domain = import-csv $LogFile_top_domain $good_result_top_domain = @() for($i=0; $i -le 29; $i++) { $t=@() $good_name = $result_top_domain[$i].myquery -replace "\s" -replace "\(\d?\d\)","." -replace "^\." -replace "\.$" $t = new-object PSObject -Property @{ Query = "$good_name"; C = "$($result_top_domain[$i]."COUNT(ALL myquery)")" } $good_result_top_domain += $t $t=@() } # Create table for email $msg.Body = "<html> <body>TOP-30 Queries <br><br><table border=""0"" cellpadding=""3"" style=""font-size:8pt;font-family:Arial,sans-serif""> <tr bgcolor=""#dddddd""> <td valign=""top""><b>Query</b></td> <td valign=""top""><b>Count</b></td> </tr> <tr bgcolor=""#dddddd""> <td valign=""top"">" foreach ($g in $good_result_top_domain) { $msg.Body += "$($g.query)</td><td valign=""top"">$($g.c)</td></tr><tr bgcolor=""#dddddd""><td valign=""top"">" } $result_top_ip = import-csv $LogFile_top_ip $msg.Body += "</td></tr></table><br>TOP-30 Clients <br><br><table border=""0"" cellpadding=""3"" style=""font-size:8pt;font-family:Arial,sans-serif""> <tr bgcolor=""#dddddd""> <td valign=""top""><b>Clients</b></td> <td valign=""top""><b>Count</b></td> </tr> <tr bgcolor=""#dddddd""> <td valign=""top"">" for($i=0; $i -le 29; $i++) { $msg.Body += "$($result_top_ip[$i].field8)</td><td valign=""top"">$($result_top_ip[$i]."COUNT(ALL Field8)")</td></tr><tr bgcolor=""#dddddd""><td valign=""top"">" } $msg.Body += "</td></tr></table></body></html>" # Send statistics $SMTPClient.Send($msg) |
4. Schedule a task, runas account must have read permission for Debug files
Example of result:
If you wanted to further play around with e.g. the IP addresses, calculate AS-numbers, limit timeframes, then here's a SpectX script (disclaimer - a commercial tool that I help build but you can also run the script with the trial version) https://www.spectx.com/articles/analysing-legacy-windows-server-dns-debug-logs
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