2018-0522

Powershell: Accessing Applications and Services Logs

Add a Comment[Author: Category: Powershell, Windows knowhow ]

Hi,

for showing or exporting the System, Application and Security Log the command let Get-EventLog is the first choice.
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2015-0322

C#: Get description attribute from an enum value

Add a Comment[Author: Category: C# ]

Hi,

in this post I will show how to read a description attribute of an enum value by reflection. Let us assume we have a enum linke this

public enum MetalBands {
	[DescriptionAttribute("This is Metallica from CA")]
	Metallica,
	[DescriptionAttribute("This is Slayer from CA")]
	Slayer,
	[DescriptionAttribute("This is Overkill from NY")]
	Overkill
};

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2013-0801

Windows: How to determine the SID of a User or Group

Add a Comment[Author: Category: Windows, Windows knowhow ]

Hi,

Sometimes you need the SID of a user or group. For example if you want to set permissions with icalcs in multilanguage environments. icacls needs as input the group name or the SID. If you want to set permission for the builtin groups you have to specify the group name in the current language of the operating system, i.e. “Users” for en-US and “Benutzer” for de-DE. The better choice is the SID, the SIDs for builtin groups are always the same.
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2013-0325

Windows: Script to get the NetBIOS Name of an Active Directory Domain

Add a Comment[Author: Category: Windows Scripts ]

Hi,

just a short post :-). A powershell script to get the NetBIOS Name of an Active Directory Domain


###############################################################################
# Gets the NetBIOS Domain
# Author Michael Albert michlstechblog.info
# License: GPL v2
###############################################################################
[reflection.assembly]::LoadWithPartialName("System.DirectoryServices.Protocols")|Out-Null

if($args.count -ne 1){
    Write-Warning " Start script with fqdn as parameter"
    Write-Warning (" for example: "+$myInvocation.myCommand.name+" yourdomain.com")
    exit 1
}
$sDomainName=$args[0]
# Get AD Root
$oRootDSE = [ADSI]"LDAP://RootDSE"
$sConfig = $oRootDSE.Get("configurationNamingContext")
# AD Object AD Root
$oADSearchRoot=New-object System.DirectoryServices.DirectoryEntry("LDAP://CN=Partitions," + $sConfig)
# Search for Netbiosname of the specified domain
$sSearchString="(&(objectclass=Crossref)(dnsRoot="+$sDomainName+")(netBIOSName=*))"
$oSearch=New-Object directoryservices.DirectorySearcher($oADSearchRoot,$sSearchString)
$sNetBIOSName=($oSearch.FindOne()).Properties["netbiosname"]
# Print out
Write-Host "Domain NetBIOS Name:" $sNetBIOSName

Have fun :-)!

Michael

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2013-0314

Script to get a list of computers connected to a Avocent KVM switch

Add a Comment[Author: Category: miscellaneous ]

Hello,

in his office, a customer have a few Avocent KVM switches to control some client computers in a remote room. He ask me about the possibility to get a list of all computers connected to these boxes, because he do not want to maintain any list by hand.

I research the documention but there is no (scripting) interface from which I could get such a list. SSH is only for connecting serial consoles, SNMP offers no OIDs for such a case.

Because of the costs, DSView isn’t a option. The only way seems to be to extracting the list by reading the Webfrontend HTML output. Let us do this 🙂

I wrote a script in powershell, at least version 2 is needed to handle selfsigned SSL certificates, which do the following:

  • Login to the Webfronted with https and SSL encryption by System.Net.HTTPWebRequest class to get the authentification cookie
  • Get the Device HTML  page by .NET class System.Net.Webclient and using Authentification cookie
  • Save HTML do a temporary file
  • Open the file with Internet Explorer
  • Get the URL to start a KVM session, computername and portnumber by  DOM

Script details

Define the User, Password, protocol and the devices:

# KVM User
[string]$sUser="Admin"
# KVM Password
[string]$sPassword="YourPassword"
# Protocol
[string]$sProtocol="https"
# Your Devices
[String[]]$aAvocentDevices=@("Console1.domain.local","Console2.domain.local")

Built HTTP POST text and disable SSL certificate warnings
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