Le blog technique

# SCRIPT TO MODIFY HOSTS FILE ON TARGET SERVER AND REMOTELY TEST RESOLUTION

Param(
$SrvList = ("Srv1","Srv2"),
$HostFilePath = "C:\Windows\System32\drivers\etc\hosts",
$cred = $(Get-Credential -Credential MyDomain\Me),
$Host1 = "Host1",
$IP1 = "0.0.0.1",
$Host2 = "Host2",
$IP2 = "0.0.0.2"
)


$cred = $(Get-Credential -Credential MyDomain\Me)




# host file
$hostcontent = 
"# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#	127.0.0.1       localhost
#	::1             localhost


# MY SERVERS
$Host1     $IP1
$Host2     $IP2
"


# FUNCTIONS
function Spec-Ping
{
Param($HostToPing)
Try {
            Test-Connection -ComputerName $HostToPing -Count 1 -ErrorAction Stop
            } 
            Catch [System.Net.NetworkInformation.PingException]
            {
            $pingresult = "PING ERROR TO $HostToPing - CHECK NAME RESOLVING"
            }

}


# OPENING WINRM SESSIONS ON MGS SERVERS
$SrvList | foreach {


            try
            {
            New-PSSession -Name $($_.Substring(0,13)) -ComputerName $_ -Credential $cred
            }
            catch
            {
            write-host -F red "Erreur lors de la creation de la session Winrm vers $_"
            }

}





$sessions = Get-PSSession

Foreach ($sess in $sessions)
    {
        
        Invoke-Command -Session $sess -ScriptBlock {Param($hostcontent,$HostFilePath) Set-Content -Path $HostFilePath -value $hostcontent} -ArgumentList $hostcontent,$HostFilePath
    
}



Write-Host "`n--- PING RESULT:"

Foreach ($sess in $sessions) 
    {
        
        # First Host Test
        $pingresult = Invoke-Command -Session $sess -ScriptBlock ${Function:Spec-Ping} -ArgumentList $Host1
            
            
            
             switch -Wildcard ($pingresult.value)
             {
             "PING ERROR*" {write-host -ForegroundColor red $pingresult.value}
             }
             

             Switch ($pingresult.IPV4Address.IPAddressToString)
                {
                $IP1 {Write-Host "OK -- $Host1 is resolved by "$sess.ComputerName" to $IP1"}
                default {Write-Host "KO - Unable to get resolution of $Host1 on"$sess.ComputerName""}
                }
    



        
         # Second Host Test
         $pingresult = Invoke-Command -Session $sess -ScriptBlock ${Function:Spec-Ping} -ArgumentList $Host2
         switch -Wildcard ($pingresult.value)
             {
             "PING ERROR*" {write-host -ForegroundColor red $pingresult.value}
             }
             

             Switch ($pingresult.IPV4Address.IPAddressToString)
                {
                $IP2 {Write-Host "OK -- $Host2 is resolved by "$sess.ComputerName" to $IP2"}
                default {Write-Host "KO - Unable to get resolution of $Host2 on"$sess.ComputerName""}
                }

    }     




#Remove Pssessions
Remove-PSSession *