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Top 50 Most Visited Posts on Sysadmins of the North

Here are the Top 50 Most Visited Posts on Sysadmins of the North. This list of high rated and interesting posts is compiled using Jetpack’s statistics and a nifty shortcode function by Have a look at them, you might have missed an interesting one!

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10 Practical Tips To Optimize WordPress hosting logo

Isn’t it true that, when you (start to) develop WordPress websites for clients, and you host them yourself, you find yourself in a situation where you need to know a lot about “stuff” other than WordPress development? In this optimize your WordPress hosting post, I provide 10 practical tips for you, to improve your WordPress hosting performance. Especially useful for when you plan to host […]

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WordPress advisory: Akal premium theme XSS vulnerability & abandonded

Over the course of one week I had the opportunity to audit two hacked WordPress websites. I could quickly discover two vulnerabilities: a Cross Site Scripting, or XSS, in a premium WordPress theme Akal, and a SQL injection Denial-of-Service in a later to be disclosed plugin. This post describes the Akal theme XSS vulnerability.

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5 Extra Ways to Clean Up Disk Space in Windows Server

dism.exe /online /Cleanup-Image /AnalyzeComponentStore

How to perform disk cleanup in Windows Server 2012 (R2) to regain used disk space using DISM from your Windows Component Store (WinSxs) is one of the most popular posts here on So apparantly, disk space usage is an issue on Windows Server. And that made me wonder: what more ways to clean up disk space in Windows Server are there?

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Samsung’s smart camera. A tale of IoT & network security

Pen Test Partners writes about IoT and security in the Samsung smart camera SNH-6410BN. They discovered eleven (11) issues, chained together to gain root access. Got r00t?

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List all MAC Addresses of all Hyper-V Virtual Machines

You sometimes need to list and get all MAC addresses of all Hyper-V virtual machines in your network. Either for your Hyper-V administration or provisioning if you don’t set an unique MAC address automatically. Here is how to get all those MAC addresses easily with PowerShell.

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Windows Server 2016 licensing model

Mark O’Shea writes on TechNet that the licensing model for Standard and Datacenter were changed with Windows Server 2016, and he introduces the changes. The information is pulled from the Windows Server 2016 Licensing Datasheet, and if you need more details you can also download the Windows Server 2016 and System Center 2016 licensing FAQ. Spoil alert (tl;dr): you’ll be paying on a core-basis, instead […]

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“How we broke PHP, hacked Pornhub and earned $20,000”

This is a very interesting read on how Dario Weißer (@haxonaut), cutz and Ruslan Habalov (@evonide) were able to find a PHP unserialize bug to exploit and gain remote code execution on Pornhub. Pornhub’s bug bounty program is at Hackerone In stead of actively attacking Pornhub, they took another road and attacked what Pornhub is built upon: PHP.

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SSL in WordPress, how to move your WordPress site to HTTPS? The Definitive Guide

HTTPS for WordPress

Add SSL and HTTPS in WordPress: an SSL certificate on your website is the de-facto standard nowadays. Google ranks sites having HTTPS – or an SSL certificate – higher in their SERP. But in WordPress, what do you need to do to set up and install an SSL certificate in your WordPress website? I’ll try to explain the steps to move WordPress from http to […]

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25 New SQLServer PowerShell cmdlets

Ayo Olubeko of the SQL Server Blog writes in the SQL PowerShell: July 2016 update. The July update for SSMS includes the first substantial improvement in SQL PowerShell in many years. We owe a lot of thanks for this effort to the great collaboration with our community. We have several new CMDLETs to share with you, but firstly, there is a very important change we […]

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MySQL InnoDB performance improvement: InnoDB buffer pool instances – Updated!

High Performance MySQL

Are you running into MySQL load problems? Learn how how I tuned my MySQL servers for a heavy InnoDB workload, by configuring innodb_buffer_pool_instances. Dividing the InnoDB Buffer Pool into multiple regions, or instances, improves Disk I/O. By doing so, you run your website, or application, efficiently and fast, by optimizing your MySQL database server InnoDB configuration. Here is a little help for you.

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KB3157663: Cumulative Update for Windows Server 2016 Technical Preview 5

Windows Server 2016

When you’re installing Windows Server 2016 Technical Preview 5, don’t forget to install KB3157663 before installing any server roles, features, or other products. Installing KB3157663 prior to any other software will fix an error with DISM and Install-WindowsFeature, error code 0x800F081F:

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KMS Migration from 2008 R2 to Windows Server 2012 R2 and KMS Activation Known Issues

Windows Server logo by Freddy2001

How to migratie an Windows Server 2008 R2 KMS to Windows Server 2012 R2, for volume activation of Microsoft products? On a new KMS server? You don’t, apparently there is no Windows Server 2008 (R2) KMS to Windows Server 2012 R2 migration. There is no way to automatically transfer your KMS role along with the products its activating to another server. Luckily Charity Shelbourne wrote […]

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10 Valuable WordPress snippets you never knew you could live without logo

10 WordPress site-specific plugin and functions.php snippets that give you a better WordPress experience. Enhance your WordPress blog / website with these small PHP snippets; WordPress filters, actions and functions. Quickly extend the functionality you need for your WordPress website! Read on…

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MySQL DoS in the Procedure Analyse Function – CVE-2015-4870

Sri Lankan Security researcher Osanda Malith discovered a DoS -or crash- vulnerability in MySQL’s Procedure Analyse Function. The vulnerability crashes MySQL versions up to 5.5.45.

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