ActiveXperts Network Monitor

Quicklinks

NOTE: ActiveXperts Network Monitor ships with a large collection of PowerShell scripts to monitor any aspect of your network. Most PowerShell scripts also have a VBScript implementation. Download Now »

DNS check

You can use any of the Powershell programs below in ActiveXperts Network Monitor. Click here for an explanation about how to include scripts in ActiveXperts Network Monitor.

Example

#################################################################################
# ActiveXperts Network Monitor PowerShell script, © ActiveXperts Software B.V.
# For more information about ActiveXperts Network Monitor, visit the ActiveXperts 
# Network Monitor web site at http://www.activexperts.com
#################################################################################
# Script
#     DNS.ps1
# Description: 
#     Query a DNS server, and validate the response
#     This function uses the ActiveSocket Toolkit, an ActiveXperts product.
#     ActiveSocket is automatically licensed when ActiveXperts Network Monitor is purchased
#     For more information about ActiveSocket, see: www.activexperts.com/network-component
# Parameters:
#     1) strDnsServer - Host name or IP address of the (remote) DNS server
#     2) strHost - Hostname or domain to query
#     3) strExpectedValue - expected value 
# Usage:
#     .\DNS.ps1 "" "host" ""
# Sample:
#     .\DNS.ps1 "ns1.ascio.net" "smpp.activexperts-labs.com" "84.53.114.73"
#################################################################################

# Parameters
param
  (
    [string]$strDnsServer,
    [string]$strHost,
    [string]$strExpectedValue
  )

cls

# Check paramters input
if( ([string]$strDnsServer -eq "") -or 
    ([string]$strHost -eq "") -or 
    ([string]$strExpectedValue -eq "") 
  )
  {
    echo "UNCERTAIN: Invalid number of parameters - Usage: .\DNS.ps1   "
    exit
  }

# Create object
$objDnsServer = new-object -comobject ActiveXperts.DnsServer
$objConstants = new-object -comobject ActiveXperts.ASConstants


#################################################################################
# THE SCRIPT ITSELF
#################################################################################
  
$SYSDATA = ""
$bMatched = $false

# Lookup
$objDnsServer.Server = $strDnsServer
$objDnsServer.Lookup( $strHost, $objConstants.asDNS_TYPE_A )

if( $objDnsServer.LastError -ne 0 )
  {
    return "UNCERTAIN: Unable to connect to query [" + $strDnsServer + "]"
    exit
  }  

$objDnsRecord = $objDnsServer.GetFirstRecord()

while ( $objDnsServer.LastError -eq 0 )
  {
    if( $objDnsRecord.Name -eq $strHost ) 
      {
        if( $SYSDATA -ne "" )
          {
            $SYSDATA = $SYSDATA + "; " 
          }  
        $SYSDATA = $SYSDATA + $objDnsRecord.Address
        if( $objDnsRecord.Address -eq $strExpectedValue )
          {
            $bMatched = $true
          }
      }
    $objDnsRecord = $objDnsServer.GetNextRecord()
  }
  
if( $bMatched -eq $true )
  {
    $res = "SUCCESS: Response matched; DATA = " + $SYSDATA
    echo $res
    exit
  }  
else
  {
    $res = "ERROR: Response did not match; DATA = " + $SYSDATA
    echo $res
    ecit
  }