Install Telnet Client using command line

Posted on 2018/08/27 by maoeh 
dism /online /Enable-Feature /FeatureName:TelnetClient
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Find existing UPN in Forest

Posted on 2018/07/26 by maoeh

A userPrincipalName (UPN) must be unique in a Active Directory Forest. To check for an existing UPN use the following lines. The powershell script expects that all DC’s within the Root Domain are GC enabled .

$RootDomain = "Contoso.com"
$DomainControllerRoot = (Get-ADDomainController -Filter * -server $RootDomain | select Hostname).hostname[0]
$GlobalCatalog = $DomainControllerRoot +":3268"
$UserPrincipalName = "Name@namespace.com"
if ((get-aduser -ldapfilter "(userPrincipalName=$UserPrincipalName)" -server $GlobalCatalog ).userPrincipalName.length -gt 0)
{
Write-host "UPN NOT unique in Forest : $UserPrincipalName "
}
Else
{
Write-host "UPN UNIQUE in Forest : $UserPrincipalName " 
}
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Force replication on all domain controller of a domain

Posted on 2018/07/26 by maoeh

The following line searches for all Domain Controllers of a Domain . Then it filters some Computers by IP (10.10.10.*) to eliminate RODCs and finally forces replication on each remaining Domain Controller.

$Domain = "Contoso.com"  
Get-ADDomainController -Filter * -server $Domain | where {$_.IPv4Address -notlike "10.10.10.*"} | foreach { repadmin /syncall /A /e /q $_.hostname}
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List disk drives into an array

Posted on 2018/07/25 by maoeh

This Powershell script ist playing with an “athook” object based on an array having different named properties .

$Array = @()
Foreach ($vol In GET-WMIOBJECT win32_logicaldisk) 
 { 
 $obj = New-Object PSObject
 $Value = $vol.DeviceID
 $obj | Add-Member -MemberType NoteProperty -Name "Drive" -value $Value
 $Value =  $vol.Volumename
 $obj | Add-Member -MemberType NoteProperty -Name "Name" -value $Value
 $value = [math]::round(( $vol.Size/ 1073741824),0)
 $obj | Add-Member -MemberType NoteProperty -Name "SizeGB" -value $Value
 $value = [math]::round(( $vol.FreeSpace/ 1073741824),0)
 $obj | Add-Member -MemberType NoteProperty -Name "FreeGB" -value $Value
 $array += $obj
 }
$array  | out-gridview
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Get Domain from distinguished Name

Posted on 2018/07/25 by maoeh

Get Domain from FQDN:

get-domfqdn “CN=Test,OU=Orgunit,DC=contoso,DC=test”

will result in

contoso.test

function get-domfqdn ($fqdn)
 {
 $afqdn= $fqdn.split(",")
 $first = 0
 $Dom=""
 foreach ($pfqdn in $afqdn)
  {
  If ($pfqdn.contains("DC=") -eq $true)
   {
   If ($first -eq 1)
    {
           $Dom = $Dom+"."
    }
   $first = 1
   $Dom = $Dom+$pfqdn.replace("DC=","")
   }
  }
 return $dom
 }
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What ADDS Site

Posted on 2018/05/08 by maoeh

To find out in what ADDS site a computer is running use the following  command

nltest [/server:<remote computer name>] /dsgetsite
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What is NTLM

Posted on 2018/05/08 by maoeh

TechNet article written by Jesper Johansson explains NTLM

Security Watch The Most Misunderstood Windows Security Setting of All Time
https://technet.microsoft.com/en-us/library/2006.08.securitywatch.asp

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