Sysadmins of the North

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

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 up a handy how to for this task.

By Jan Reilink 02/06/2016Windows Server

WordPress

17+ Useful WordPress snippets

Here are 17+ valuable WordPress snippets for site-specific plugins and functions.php to provide you a better WordPress experience. Enhance your WordPress site with these small PHP snippets: WordPress filters, actions and functions. Quickly add or extend the functionality you need for your WordPress website! Read on...

By Jan Reilink 30/05/2016WordPress

MySQL

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.

By Jan Reilink 30/05/2016MySQL

IIS URL Rewrite Module installation error IIS 10

Windows Server

How to install IIS URL Rewrite Module on Windows Server 2016 & IIS 10

You can't install IIS URL Rewrite Module 2 on Windows Server 2016 and IIS 10.0, because it exits with an incompatibility message. Looks like the installer tries to compare strings as version numbers. Here is how to successfully install IIS URL Rewrite Module in IIS 10.

By Jan Reilink 30/05/2016Windows Server

PowerShell

PowerShell blacklist check script: find an IP address’ blacklist status & reputation

A blacklist check script written in PowerShell. You can use this to lookup an IP address in various blacklists (DNSBL, RBL). Such a check is a great indicator for an IP address' reputation. Basically this PowerShell blacklist checker is a port of my Bash script to check an IP address blacklist status in Linux.

By Jan Reilink 19/05/2016PowerShell

Windows Server

AppCmd introduction and examples

AppCmd.exe is a command-line utility to manage Windows Server IIS 7+ web servers. The AppCmd command is your one-stop-shop for administering Windows Server IIS web servers. In combination with WinRM it’s your Swiss Army knife for your daily routine. This post introduces appcmd and provides you with a lot of helpful appcmd examples.

By Jan Reilink 17/05/2016Windows Server

Windows Server

Ghost on IIS with HTTPS, how to resolve a “Too many redirects” error

When you use iisnode to host the Node.js blogging software Ghost on your IIS web server, and you set up an SSL certificate for your Ghost website, you may run into too many redirect issues when changing Ghost's config.js file. This happend to me yesterday, and here is the solution.

By Jan Reilink 17/05/2016Windows Server

PowerShell

Get current number of FTP client connections (NonAnonymous) with PowerShell and Get-Counter

Ever wanted to know the current number of active FTP client connections on your Windows Server IIS FTP Service? You can get this statistic using PowerShell, the Get-Counter cmdlet and the Microsoft FTP Service Current NonAnonymous Users performance counter.

By Jan Reilink 03/05/2016PowerShell

Web application security

Binary webshell through OPcache in PHP 7

GoSecure wrote up a new PHP exploitation technique using the default OPcache engine from PHP 7. Using this attack vector, it's possible to bypass certain hardening techniques that disallow the file write access in the web directory.

By Jan Reilink 28/04/2016Web application security

PowerShell

Simple PowerShell introduction for Windows Server administration, automation and scripting

Windows PowerShell is an important tool in Windows Server for administrators. You can use PowerShell for Windows Server administration, software installation, automation, and shell/command-line scripting. Here is a small and simple introduction to Windows PowerShell.

By Jan Reilink 28/04/2016PowerShell

Windows Server

Windows Update error 0xc1420127 and 0xc190010b when upgrading Windows 8.1 to Windows 10

Fix Windows Update errors 0xc1420127 and 0xc190010b when they ocure during a Windows 8.1 to Windows 10 upgrade; possible solutions and tips are provided in this post.

By Jan Reilink 25/04/2016Windows Server

Windows Server

How to install Microsoft’s SQL Server Driver for PHP

In this article I'll show you how to install the Microsoft SQL Server Driver for PHP 7+. This makes the use of an SQL Server database back-end for your PHP website easy. This post walks you through the steps necessary to install the SQL Server driver and SQLSRV extension for PHP 7+, on Windows Server IIS of course.

By Jan Reilink 13/04/2016Windows Server

WordPress

Optimize WordPress MySQL tables through Cron, behind the scenes

To regularly optimize my WordPress database tables, I created a small plugin that utilizes the WordPress Cron feature. This comes in handy to perform database optimization for WordPress on a regular basis, without forgetting about it. Just activate and enjoy. And here is the plugin code.

By Jan Reilink 04/03/2016WordPress

Windows Server

HackRepair.com’s Bad Bots .htaccess in web.config for IIS

Block bad bots in WIndows Server IIS using web.config. Learn to protect your WordPress website with this web.config file!

By Jan Reilink 19/02/2016Windows Server

Windows Server

IIS URL Rewrite “Rewrite Module error: Expression contains a repeat expression”

How to fix the HTTP Error 500.52 - URL Rewrite Module Error: "The expression "^/{C:1}" contains a repeat expression (one of '*', '?', '+', '{' in most contexts) that is not preceded by an expression" on Windows Server IIS.

By Jan Reilink 16/02/2016Windows Server

Sysadmins of the North

Disable ECDH public server param reuse in Windows Server IIS

Create strong passwords in Windows

Install IIS in Windows 11 using PowerShell

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

17+ Useful WordPress snippets

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

How to install IIS URL Rewrite Module on Windows Server 2016 & IIS 10

PowerShell blacklist check script: find an IP address’ blacklist status & reputation

AppCmd introduction and examples

Ghost on IIS with HTTPS, how to resolve a “Too many redirects” error

Get current number of FTP client connections (NonAnonymous) with PowerShell and Get-Counter

Binary webshell through OPcache in PHP 7

Simple PowerShell introduction for Windows Server administration, automation and scripting

Windows Update error 0xc1420127 and 0xc190010b when upgrading Windows 8.1 to Windows 10

How to install Microsoft’s SQL Server Driver for PHP

Optimize WordPress MySQL tables through Cron, behind the scenes

HackRepair.com’s Bad Bots .htaccess in web.config for IIS

IIS URL Rewrite “Rewrite Module error: Expression contains a repeat expression”

Windows Server

Web applications

PowerShell