Windows Server 2016 on Hyper-V stuck at stopping

If a Windows Server 2016 guest VM on Hyper-V hangs while stopping after Windows Updates, it might be caused by the recovery debug information type set. Especially when you have moved the Windows PageFile to a different partition/VHDX.

Increase WordPress’ memory limit WP_MEMORY_LIMIT properly in wp-config.php

Here is how to increase WordPress’ memory limit (WP_MEMORY_LIMIT) properly. I see this done wrong over and over again in WordPress plugins and themes. In a worst case scenario this may even decrease the available amount of memory for WordPress! So be careful with the advice you follow. In this post I show you one…

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List all SPNs used in your Active Directory

There are a lot of hints & tips out there for troubleshooting SPNs, or Service Principal Names. Listing duplicate SPNs is fairly easy, just use setspn -X on your command-line and you’ll find out. But how do you find out which SPNs are used for which users and computers are used for this?

Important note about Windows Update KB4056892

There is another VERY IMPORTANT THING with Microsoft Meltdown patches like update KB4056892: – Customers will not receive these security updates and will not be protected from security vulnerabilities unless their anti-virus software vendor sets the following registry key:

How to: Determine which .NET Framework versions are installed

Users can install and run multiple versions of the .NET Framework on their computers. When you develop or deploy your app, you might need to know which .NET Framework versions are installed on the user’s computer.

How to unzip a file in PowerShell

Unzipping a file on your PowerShell command line may come in handy sometimes, even on your Windows 10 workstation. Use Expand-Archive for this, and all that is required is PowerShell 5.0+, or the .NET 4.5+ Framework to use System.IO.Compression.ZipFile.

Restore single MySQL table from a full mysqldump backup file

If you need to restore a single table from a full MySQL backup, you may find yourself wondering “how do I do that?”. There are a few steps required, I outline them here for you to restore the contents of just one table back into the database from the mysqldump using Bash.

plain FTP without TLS configured in an FileZilla Site Manager entry.

How to turn off the TLS default in FileZilla?

A short post for my colleagues at the customer support and anyone else wondering the same: how to disable TLS encryption in FileZilla and turn off the FTP over TLS default setting?

How to: Protect WordPress from brute-force XML-RPC attacks

The WordPress XML-RPC API has been under attack for many years now. Back in August 2014, WordPress released version 3.9.2, fixing a possible denial of service issue in PHP’s XML processing. There are brute-force amplification attacks, reported by Sucuri, and so on. So, how do you protect WordPress from xmlrpc.php attacks, but still being able…

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WSUS Application Pool IIS Advanced Settings

WsusPool keeps crashing: stops again and again

Sometimes you find your WSUS server keeps crashing over and over again. WSUS is unavailable and/or the WSUS management console hangs. When you start to investigate as to why Windows Server Update Services crashes, you’ll notice the following error message being logged in the HTTPErr log files:

Remove Jetpack email sharing service

Recently the WordPress Jetpack email sharing service is often abused by spammers. They use the Send to Email Address for sending spam. All these kind of “Tell a Friend” scripts are abused a lot. Here is how to disable email share service in Jetpack.