Citrus Stack

Still hosted with a cPanel based server which makes your websites crawl to a halt? Look no further.

The Citrus stack is a panel-less high-performance server stack with bleeding-edge web technologies built in. It gives you ultimate speed out of your VPS or dedicated servers.

The Citrus stack web server environment is based on a fine-tuned configuration of open-source software. We have decided to give it a special code name to distinguish it as high-performance server stack for the modern web. GetPageSpeed can provision a server from any hosting provider with the complete Citrus Stack.

Read on what is included with every installation below.


We believe nothing is more important to performance than supporting high traffic. Do you want just to score in a PageSpeed test for nothing or you want more sales, more customers, faster speed? You don’t want your website to die when it gets a few more visitors hitting the homepage? We’re on the same page now! Our optimized configuration for WordPress and Magento will take care of all that – support thousands of visitors, more sales, more income, and more speed now

Latest NGINX

Our NGINX build supports HTTP/2 connections in every version of the Chrome browser. It is compiled with recent OpenSSL, making it more secure and bringing wider support for HTTP/2 to your users.

The nginx build by GetPageSpeed is hosted at customer only YUM repository. It’s built against OpenSSL >= 1.0.2 in order to support ALPN protocol negotiation for HTTP/2.

Verify if your website supports HTTP/2 in Chrome here.

NGINX Amplify

The NGINX Amplify provides you with a nice overview of your server. It will monitor your server uptime and load and helps troubleshoot Nginx configuration in case of a problem.

Amplify agent installation is included with every server configuration.


PHP 7 is installed by default on Citrus servers. It gives excellent performance and beats all prior versions in terms of speed.

PHP Opcache

Your PHP scripts don’t need to be parsed all the time! We make it so there is no extra time spent on parsing the PHP scripts. This feature is very important to have with WordPress, Magento, and other large frameworks.

Solid outgoing email

Every email message your server sends is signed with a DKIM key. What gives? Your website visitors and clients never have to hunt for your message in their junk mailbox

Google PageSpeed.

What gives? Serve WebP optimized images to supporting browsers to speed things up further

Best encryption

Your website SSL will score A+ in Qualys SSL labs test

Linux network tweaks

We take care of applying all the necessary network tweaks at the kernel level

Website security

Your website runs with proper security. Each website has its own dedicated site user to isolate sites from each other and secure them better.

NGINX microcache

Want some more performance juice even with Varnish? This is the extra bit we have.


Stores PHP sessions in RAM


Fail2ban is an intrusion prevention system that will protect your system from brute force attacks

Percona MySQL

It’s the same MySQL, optimized for performance by good guys from Percona.


Reliable mail delivery agent. Configured to send outgoing email only, making sure that your server will not get into blocklists.

Brotli compression.

Citrus has complete support for the brand new compression method by Google. The Brotli compressed files are served with maximum compression level 11 and don’t require much CPU thanks to special configuration ingredients. Shrink down that CSS or JS to 10KB from 100KB! For those interested to implement Brotli compression with Varnish on their own, check out this post on enabling Brotli in Varnish.

Our special recipe Brotli configuration works even with the PageSpeed module!

Command-line goodness

There are many programs installed on the command line. Most are targeted towards performance tuning:


A top clone for MySQL.


Notorious MySQL tuning script