IoT Security: 42 Top Internet of Things Security Solutions

After researching IoT security. I’ve decided to maintain a list of companies which offer IoT (internet of things) security tools and solutions. Feel free to share your solutions, feedback and tips for securing IoT devices. This list will continue to grow in the coming days, week, months and beyond. In the aftermath of the 2016 DDoS […]

Your Web Host Doesn’t Want You To Read This: Benchmark Your VPS

June 17th 2019: Added instructions for network speed test using speedtest-cli script. Oct 31st 2017: Also see this list of command line scripts. Nov 2nd 2016: Included quick dd commands to check cached vs uncached disk read performance. This article will highlight using the ‘dd’ Unix command for a quick benchmark of your Linux server or VPS. […]

Nginx tuning tips: TLS/SSL HTTPS – Improved TTFB/latency

Since 30th June 2018, the PCI Security Standards Council requires that support for SSL 3.0 and TLS 1.0 be disabled. TLS 1.1 or higher must be used and TLS 1.2 is strongly recommended. In addition, as of July 2018, Google Chrome began to mark ‘HTTP’ web sites as “not secure”. Over the past few years, the […]

Zorin Linux – As a Windows OS (and MacOS) Replacement

This article has been edited and updated from the original 2014 article. For 2019, I still recommend Zorin Linux as a Windows OS replacement and now as a MacOS replacement. Five years later and I’m more confident about this recommendation.  You’ve probably heard about or been affected by the retirement of Windows XP support on April 8, […]

“MySQL server has gone away” error – Solution(s)

MySQL server has gone away error means that MySQL server (mysqld) timed out and closed the connection. By default, MySQL will close connections after eight hours (28800 seconds) if nothing happens. However, in some cases your web host, DBA or app developer may have decreased this timeout setting, discussed below. MySQL server has gone away, can be […]

How to Convert OpenSSH keys to Putty (.ppk) on Linux

PuTTYgen is an key generator for creating SSH keys for PuTTY. PuTTYgen is comparable in certain respects to the ssh-keygen tool. PuTTYgen can be used to create public and private key pairs (in .ppk file format). In addition, PuTTYgen can also be used to convert keys to and from other formats. On Windows PuTTYGen is a graphical tool. A command-line version is available for […]

Replacing getty with ngetty on Debian

This article was originally posted back in October 2013. As such, I’ve updated it, since the current Debian release, Debian 9, no longer uses init, but instead uses systemd. Systemd is a system and service manager for Linux. It is the default init system for Debian since Debian 8 (Jessie).  ngetty or mingetty may be useful for […]

25 Best CDN Providers 2019

A content delivery network, also referred to as a content distribution network (CDN) is a geographically distributed network of data centers containing proxy servers. CDN Providers serve Internet content, including web objects (text, graphics and scripts), downloadable objects (media files, software, documents), applications (e-commerce, portals), live streaming media, etc… closer to and thus faster, to end users. Some of the main advantages […]

Pruning Magento Cache & Sessions Using Cron

Note: Magento 1.x only. Over the weekend a client contacted me because they had serious performance issues with their Magento based store. The three main issues were: Checkout taking more than 30 seconds to complete after clicking to submit payment. (Causing double orders/payments and users just leaving the store) Login to the front or back end […]

PHP Performance: Additional CPU cores or Faster CPU cores

  Some time ago I received an email from a client experiencing slow performance issues with a LEMP (Linux, Nginx, MySQL and PHP web server). During a full audit, I found that the server’s load average was pretty low (see above screenshot). However, the website was indeed very slow. There were some misconfigurations, but one […]