The latest in tech, SysOps, personal growth, scripting, servers, virtualization and databases curated for you daily.
Jan Reilink 
ECN is an optional feature that may be used between two ECN-enabled endpoints when the underlying network infrastructure also supports it. Unfortunately, having one ECN Capability enabled endpoint may slow down outbound network connections to outdated network equipment.
The other day, when I attempted to add a newly installed Active Directory to become the slave domain controller of a master, the error message "A domain rename operation is already in progress" was displayed. Promoting the Windows Server 2012 R2 server to a Domain Controller failed.
Cconvert decimal to hex hexadecimal to decimal and Unix timestamps in Linux Bash. A quicky for my archives.
How to set up a global Geolocation DNS load balancing Varnish Cache Content Delivery Network with Bind9, geo-ip database, Varnish Cache and DigtalOcean. DIY High-Availability for your website!
Learn how to optimize PHP performance by checking and setting PHP realpath_cache_size. The realpath_cache_size size represents the total number of bytes in the path strings stored, plus the size of the data associated with the cache entry
How to display commas in WordPress tags? And why have commas in WP taxonomies?
In this article you'll learn how to start all stopped application pools that have the ApplicationPool.AutoStart property set to $True using AppCmd.exe or PowerShell. This is something you often or occasionally have to perform on various servers, for example when an application pool hangs.
A useful PHP script to check if your website is up and online available. It uses PHP and cURL. This script comes in handy because website uptime and availability is important, and you want your website to be always online available.
Exploit PHP's mail() function for remote code execution. Apparently, if you are able to control the 5th parameter of the mail() function ($options), you have the opportunity to execute arbitrary commands.
Outdated but fun: PHP 7 with OPcache in IIS Express for Microsoft WebMatrix 3: create your DevOps with Microsoft WebMatrix and IIS Express
Learn how to override wp-mail() and send secure email using authenticated SMTP and StartTLS from WordPress.
How to identify, block, mitigate and leverage xmlrpc.php scans, brute-force, and user enumeration attacks on WordPress sites... Secure WordPress xmlprc.php interface and reduce service disruption.
Windows Server IIS loves to tell the world that a website runs on IIS. It does so with the "Server:" header in the HTTP response, as shown below. In this post I'll show you how to remove HTTP response headers in Windows Server IIS. You don't want to give hackers too much information about your servers, right?.
When the .svc web service handler doesn't work in IIS with ASP.NET 4.5 and returns a 404 Not Found error, you may need to add an extra handler to IIS. Read on...
Learn how to speed-up Joomla performance on Windows Server IIS using these 8 simple, but important, tips. Add caching, gzip compression, set your sessions & optimize MySQL database functions.
How to delete all MAILER-DAEMON emails from your Postfix queue, when it matches a sender or recipient email address condition. In Postfix, there are various similar commands to delete messages from the Postfix mail queue, based on the Message-ID and/or email address for example...
Easily enable support for the WebSocket protocol on Windows Server IIS by installing the Web-WebSockets feature using PowerShell. Learn how to install WebSocket Protocol support in Windows Server IIS 8.0.
Sometimes it's important to remove (or hide) the file extension of scripts you use. Security by obscurity might be that reason, if you don't want others to know what script language you are using for your website, or for static site hosts.
Investigate SMTP authentication issues like a boss! When using TLS encrypted SMTP connections, it's always handy if you are able to create a SMTP logon credentials and test SMTP authentication over a TLS/StartTLS connection. Preferably from your command-prompt.
Gzip compression conflicts with IIS Outbound Rules resulting in HTTP 500.52 URL Rewrite Module Error. Here is how to resolve this.