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How to Fix Missing HTTP_HOST with Nginx, HTTP/3, and PHP-FPM

ByPieter Bakker

The Problem: HTTP_HOST Disappears with HTTP/3 If you’ve recently upgraded to HTTP/3 on your Nginx server hosting WordPress or other PHP applications, you might have encountered some frustrating issues: These problems all stem from a single source: the HTTP_HOST variable goes missing when serving requests over HTTP/3, breaking critical functionality in PHP applications. Understanding the…

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Get the Latest Version of Nginx on Debian 12

ByPieter Bakker

While Debian’s default repositories provide a stable version of Nginx, using the official Nginx repository ensures you have access to the latest features, security updates, and performance improvements as soon as they’re released. This guide walks you through installing and configuring Nginx directly from the official repository on Debian 12 (Bookworm), helping you maintain a…

Enable Keepalive in Nginx Reverse Proxy

ByPieter Bakker

In the Nginx Reverse Proxy context, keepalive connections are a critical performance optimization technique that allows multiple HTTP requests to be transmitted over a single TCP connection, dramatically reducing connection overhead and improving overall system performance. The Performance Challenge Traditional HTTP connections require a complete handshake for each request: This process introduces significant latency and…

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WordPress Upload Guide: Nginx & PHP-FPM Optimization

ByPieter Bakker

If you’re a WordPress user hosting your site on an Nginx server with PHP-FPM, you may encounter issues when uploading large files or migrating your site using popular plugins like UpdraftPlus or WPvivid. This guide will help you configure your server to handle large file uploads smoothly, ensuring a hassle-free experience when managing your WordPress…

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How to set up Nginx FastCGI Page Cache with WordPress.

ByPieter Bakker

Nginx FastCGI cache is a feature of the Nginx web server that enables the caching of dynamic content generated by FastCGI applications such as PHP. By caching the dynamic content, Nginx can serve the content directly to visitors as a static page so that the same dynamic request does not have to be processed repeatedly,…

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How to solve “page cache is not detected but the server response time is ok” in WordPress Site Health.

ByPieter Bakker

If you don’t use any of the popular caching plugins (e.g. WP-Rocket, W3 Total Cache, WP Super Cache…), but instead deploy Nginx FastCGI cache for (server side) Full Page Caching, you will probably see the message “page cache is not detected but the server response time is ok” when you run the “Site Health” checker…

Nginx: [warn] protocol options redefined

ByPieter Bakker

If you get an error message “nginx: [warn] protocol options redefined” after upgrading Nginx to the latest stable version 1.24, you can easily fix it by adding “http2” to the 443 “Listen” directive in the default.conf file. vi /etc/nginx/conf.d/default.conf server { listen 80 default_server; listen [::]:80 default_server; listen 443 default_server http2 ssl; listen [::]:443 default_server…

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Generate SSL certificates with acme.sh on Nginx.

ByPieter Bakker

In this article, we will see how to install and configure “acme.sh” to generate SSL certificates for domains and how to implement it with Nginx to secure the connection to corresponding websites hosted on our web server via “HTTPS”. To optimize the security of connections to the web server and comply with all applicable guidelines,…