Convert decimal to hex in Bash, hexadecimal to decimal and dates to Unix timestamp
2014-11-06
Cconvert decimal to hex hexadecimal to decimal and Unix timestamps in Linux Bash. A quicky for my archives.
Sysadmins of the North goes global!
2014-10-29
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!
How to set a good PHP realpath_cache_size
2014-10-23
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
Conditionally start Application Pools on remote IIS web servers
2014-09-11
In this article you'll learn how to start all stopped application pools that have the ApplicationPool.AutoStart property set to $True using AppCmd.exe or PowerShell. This is something you often or occasionally have to perform on various servers, for example when an application pool hangs.
Check website availability with PHP and cURL
2014-09-10
A useful PHP script to check if your website is up and online available. It uses PHP and cURL. This script comes in handy because website uptime and availability is important, and you want your website to be always online available.
Exploit PHP’s mail() to get remote code execution
2014-09-07
Exploit PHP's mail() function for remote code execution. Apparently, if you are able to control the 5th parameter of the mail() function ($options), you have the opportunity to execute arbitrary commands.
Custom PHP version on IIS Express and WebMatrix 3
2014-08-19
Outdated but fun: PHP 7 with OPcache in IIS Express for Microsoft WebMatrix 3: create your DevOps with Microsoft WebMatrix and IIS Express
Send authenticated SMTP email over TLS from WordPress
2014-07-29
Learn how to override wp-mail() and send secure email using authenticated SMTP and StartTLS from WordPress.
Huge increase in WordPress xmlrpc.php POST requests
2014-07-07
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.
Remove IIS Server version HTTP Response Header
2014-07-06
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?.
.svc WCF web service returns 404 Not Found in IIS 8
2014-06-30
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...
8 Tips to improve Joomla performance
2014-06-29
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.
Delete all MAILER-DAEMON emails in Postfix queue
2014-06-04
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...
How to install the Web-WebSockets feature in IIS using PowerShell
2014-05-27
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.
Hide the .php file extension with IIS URL Rewrite Module
2014-05-23
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.
Test SMTP authentication and StartTLS
2014-05-17
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.
IIS Outbound Rules with gzip compression
2014-05-13
Gzip compression conflicts with IIS Outbound Rules resulting in HTTP 500.52 URL Rewrite Module Error. Here is how to resolve this.
Check, repair and optimize MySQL tables with mysqlcheck
2014-05-02
MySQL's mysqlcheck is a command line table maintenance program: it checks, repairs, optimizes, or analyzes tables. Very handy for automated performance optimizations of MySQL databases and tables.
How to clean up Contact Form 7 temporary captcha files on IIS web servers
2014-04-28
On IIS, Contact Form 7 captcha has one HUGE disadvantage: temporary captcha files placed in wp-content/uploads/wpcf7_captcha, are not automatically removed. Here is how to remove Contact Form 7 temporary captcha files on IIS…
Set or remove the read-only attribute assigned to files with PHP chmod
2014-04-27
Change file attributes with PHP chmod to make files read-only or normally accessible on Windows Server IIS.