Huge increase in WordPress xmlrpc.php POST requests

WordPress xmlprc.php DDoS and brute-force attacks. How to identify, block, mitigate and leverage these xmlrpc.php scans, brute-force, and user enumeration attacks on WordPress sites… Secure WordPress xmlprc.php interface and reduce service disruption. Did this post helped you solve a problem? Or dit you find it interesting? Support Sysadmins of the North with a direct donation…

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WordPress wp_options table autoload micro-optimization

Learn how to optimize WordPress’ wp_options table for faster database results. This probably isn’t a big issue, but today I noticed a slow MySQL query coming from a WordPress database (WordPress wp_options table). This made me investigate and to optimize the WordPress wp_options table “autoload” feature. The autoload feature loads and caches all autoloaded options,…

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Install WordPress plugins without WP-admin access

Install WordPress plugins without admin access, and automate your WordPress customization and plugin installation. WordPress has a little drop-in plugin option available in the form of /wp-content/install.php. This install.php file is not present at default, but when created it can be used to install plugins without wp-admin access. This might come in handy for unattended…

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How to clean up Contact Form 7 temporary captcha files on IIS web servers

Contact Form 7 is a WordPress plugin that provides a simple but flexible contact form. On IIS, Contact Form 7 captcha has one HUGE disadvantage: temporary captcha files placed in wp-content/uploads/wpcf7_captcha, are not automatically removed. The files are made read only. Here is how to remove Contact Form 7 temporary captcha files on IIS… Did…

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WordPress plugin “In Over Your Archives” Call-time pass-by-reference fix for PHP 5.4

How to fix PHP Call-time pass-by-reference has been removed in errors. The following PHP fix goes for nearly all PHP Call-time pass-by-reference errors: The WordPress plugin In Over Your Archives is a plugin to display your archive page in a nice way, just like on inoveryourhead.net. The plugin hasn’t been updated in quite some time…

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How to load google-code-prettify syntax highlighting without plugins

If you run a WordPress blog where you display (parts of) source code, syntax highlighting is a must! It prettifies the code which makes it easier to read and it distinguishes code from text. However, most syntax highlighting is made available through plugins, and we all know too many plugins bring a lot of overhead…

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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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WordPress HyperDB is an advanced database class that supports replication

HyperDB database class. HyperDB: an advanced database class for WordPress, that supports replication and partition of data. HyperDB is a replacement for the standard wpdb class, which adds the ability to use multiple databases. HyperDB supports partition of data as well as replication. Did this post helped you solve a problem? Or dit you find…

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Clean up WordPress post revisions

Delete WordPress post revisions, turn them off and speed up your WordPress blog. Every time you write or edit a WordPress post, WordPress saves the change as a post revision. As you might expect, this fills up your database with a huge amount of unneeded post revisions and information. This uses space which should be…

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