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How to fix System.Collections.Generic.KeyNotFoundException “The given key was not present in the dictionary” Exception with MySQL Connector/NET and utf8mb4 character set

An System.Collections.Generic.KeyNotFoundException “The given key was not present in the dictionary” can be the result of using a too old MySQL Connector/NET version in your ASP.NET web application. A KeyNotFoundException is thrown when an operation attempts to retrieve an element from a collection using a key that does not exist in that collection. An unsupported…

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SSL in WordPress: how to move WordPress to HTTPS? The definitive guide

Having an SSL certificate in your WordPress is the de-facto standard nowadays, did you know that? Google ranks sites having HTTPS higher in their SERP. But in WordPress, how do you configure an SSL certificate and HTTPS URL? You’ll learn the important steps to move WordPress from http to https in this post. Jan ReilinkMy…

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AppCmd introduction and examples

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. Jan ReilinkMy name is Jan. I am not a hacker, coder, developer or guru. I…

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Minify WP-Super-Cache HTML cache files: WPSCMin a WP-Super-Cache plugin

The WordPress WP-Super-Cache cache plugin doesn’t minify HTML cache files, which I find a disadvantage. Knowing minify libraries, I went looking for an existing solution (why reinvent the wheel?), and found one: WPSCMin. Read on … Jan ReilinkMy name is Jan. I am not a hacker, coder, developer or guru. I am merely a systems…

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HTTPS for WordPress

Redirect HTTP to HTTPS

In this post I provide you various HTTP to HTTPS redirection methods, for Windows Server IIS and Linux Apache. Use these examples to your advantage to secure the traffic between your visitors and your website. Jan ReilinkMy name is Jan. I am not a hacker, coder, developer or guru. I am merely a systems administrator,…

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Conditionally start Application Pools on remote IIS web servers

Start all stopped application pools that have Autostart set to true Start stopped application pools with AppCmd or PowerShell in a loop. In my routine, I occasionally have to start multiple website application pools when they are in a stopped state. On more than one web server. Being a lazy system administrator, I find it…

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Joomla ACL decision flow-chart

8 Tips to improve Joomla performance

How to speed-up Joomla performance on Windows Server IIS: 8 important, but simple, tips to improve & speed up Joomla Add caching, gzip compression, set your sessions & optimize MySQL database functions… Provide your visitors with a blazing fast Joomla website! Jan ReilinkMy name is Jan. I am not a hacker, coder, developer or guru.…

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Optimize images for the web in bulk

Optimizing and loss-less compressing images is one of those items that always pops up when analyzing your website with Google PageSpeed Insights. Images have to be loss-less compressed to save many bytes of data and thus bandwidth. This speeds up the download time of your website. But, how do we optimize images for the web?…

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Add websites and application pools to IIS with PowerShell, in a for loop

How to use PowerShell to create websites and application pools in IIS… A client of the company I work for wanted to quickly add 60 sub-domains to his website. But, the sub-domains had to be created as self contained IIS websites, and running in their own application pools. Luckily, the client wanted 60 consecutive sub-domain…

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How to send authenticated SMTP over a TLS encrypted connection, in PHP, ASP and ASP.NET?

Send authenticated SMTP (auth-SMTP) over a TLS encrypted connection. If you want to send email securely from your website, this post is for you! In this post I’ll provide some script examples for ASP, PHP, and ASP.NET (C# / VB.Net) that you can easily integrate in your website. Jan ReilinkMy name is Jan. I am…

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