Category: PowerShell

Wake on LAN all computers in a LAN retrieving the MAC addresses from a Windows DHCP Server

If you’re a network administrator, you may need to occasionally access and manage computers on your network remotely. This can be especially useful if you need to perform tasks or make changes to multiple computers at once. One way to accomplish this is to use PowerShell to get a list of all the computers on…




Wake-on-LAN using PowerShell

Wake-on-LAN and the Magic Packet The format of a Wake-on-LAN (WOL) magic packet is defined as a byte array with 6 bytes of value 255 (0xFF) and 16 repetitions of the target machine‚Äôs 48-bit (6-byte) MAC address. (See Wikipedia article) Wake-on-LAN works by broadcasting the magic packet to all network devices in a network. The…



Chocolatey on Windows

Introduction Chocolatey is a Windows counterpart to the Linux apt package manager or yum package manager. The software offers a CLI-based package installation and management in Windows with the community-maintained package repository. In this tutorial, you will learn to install Chocolatey on Windows 10 and learn basic Chocolatey commands. Prerequisites Windows 7+/Windows 2003+ (including Server Core, but excluding…




PowerShell – Quickly create a GPO report

Someone asked me today how to easily export a readable report of all GPOs applied to a system (they were doing a security audit and needed a simple way to script this). Of course, I immediately thought of PowerShell! So here is how to export a readable report of all GPOs applied to a given…



How to access an Exchange Online mailbox without a license

An Office 365 or Microsoft 365 Admin will hopefully have a separate admin account to perform higher level (privileged) tasks, compared the their standard user account. As a result, admin accounts should not need any license, because they are not used as a normal user. A person should not need to have two sets of…




Microsoft Teams – Quickly add a Webhook to a Teams channel and send a message using PowerShell

I just discovered the possibility to add Webhooks to a Teams Channel. Since webhooks are nothing new to me, i wanted to know if my PowerShell Scripts i created when i was playing last time with Webhooks if they’re working with the Teams API as well – surprise, i created a Webhook and sent a…




Get your WAN/public IP address using PowerShell and ipify.org

I just discovered the ipify.org service to quickly get your public / WAN IP address. https://www.ipify.org/ – API Usage for IPv4 So to get the WAN / public IP address using PowerShell (New-Object System.Net.WebClient).DownloadString(‘https://api.ipify.org’) Or get it as JSON and ConvertFrom-Json-it (New-Object System.Net.WebClient).DownloadString(‘https://api.ipify.org?format=json’) | ConvertFrom-Json Yeah, i know, my WAN IP is visible in the…




File in use / Use PowerShell to find out witch process is locking a file

When we tried to upgrade to the latest Nextcloud Client (Version2.6.5), we were confronted with the following error message. The file C:\Program Files\Nextcloud\shellext\OCOverlays.dll is in-use and can’t be overwritten -> (if you think about it, it’s already clear that the Explorer Proess ‘locked’ this file, as this library is most likely used to overlay the…




PowerShell Active Directory Module – Cheat Sheet

Retrieve all Windows Server Computer Get-ADComputer -Filter ‘operatingsystem -like "*server*" -and enabled -eq "true"’ ` -Properties Name,Operatingsystem,OperatingSystemVersion,IPv4Address | Sort-Object -Property Operatingsystem | Select-Object -Property Name,Operatingsystem,OperatingSystemVersion,IPv4Address Retrieve all Windows Client Computer Get-ADComputer -Filter ‘operatingsystem -notlike "*server*" -and enabled -eq "true"’ ` -Properties Name,Operatingsystem,OperatingSystemVersion,IPv4Address | Sort-Object -Property Operatingsystem | Select-Object -Property Name,Operatingsystem,OperatingSystemVersion,IPv4Address Retrieve all Domain-Controllers (w/o Member…




Sign your PowerShell scripts with a code signing certificate

Prerequisite is -> you need an issued and world or domain-trusted code signing certificate. Read more about how to issue a code signing certificate (CSR) and how to issue one using your in house Certification Authority Let’s start a PowerShell Console as admin – then use this command to list available code signing certificates: Get-ChildItem…