In an era where instant access to information is the norm, ensuring your website loads quickly is crucial for retaining visitors and improving search engine rankings. Users expect seamless, lightning-fast browsing, and even a slight delay can lead to increased bounce rates and lost conversions. Modern protocols like HTTP/3 and QUIC significantly enhance web performance by improving data transmission speed, security, and reliability.

Unlike traditional HTTP versions that rely on TCP, HTTP/3 uses QUIC, which operates over UDP. This eliminates the latency caused by TCP’s handshake process and provides faster, more stable connections—especially useful for users on mobile or unreliable networks.

CyberPanel, a modern web hosting control panel powered by OpenLiteSpeed, offers native support for HTTP/3 and QUIC. This integration enables website owners to reduce latency, accelerate page loads, and enhance security with minimal configuration.

In this step-by-step guide, you’ll learn what HTTP/3 and QUIC are, why they matter, and how to enable them on your CyberPanel server to boost website performance and SEO.

Understanding HTTP/3 and QUIC

What is HTTP/3?

As the newest iteration of the HyperText Transfer Protocol, HTTP/3 builds upon HTTP/2’s foundation while utilizing QUIC to address its performance bottlenecks. Unlike previous HTTP versions that rely on TCP (Transmission Control Protocol), HTTP/3 uses QUIC to deliver faster, more secure, and more reliable connections, especially in scenarios with high latency or unstable network conditions.

What is QUIC?

QUIC (Quick UDP Internet Connections) is a transport layer protocol developed by Google. It enhances speed and reliability by:

• Using UDP for faster data transmission
• Eliminating head-of-line blocking
• Integrating TLS encryption by default

QUIC supports multiplexed connections and rapid re-connections, especially on mobile devices and spotty networks.

Key Benefits of HTTP/3 and QUIC

• Faster Load Times – Reduces latency by skipping TCP handshakes
• Enhanced Security – Built-in TLS 1.3 encryption by default
• Mobile Optimization – Efficiently handles network switches and packet loss
• Multiplexing Support – Prevents head-of-line blocking for smoother content loading

Steps to Activate HTTP/3 and QUIC on CyberPanel

Step 1: Verify CyberPanel Installation

Ensure CyberPanel is installed and running. Access your panel via:

https://yourdomain.com:8090

Log in and confirm your web server is operational and up-to-date.

Step 2: Update OpenLiteSpeed

HTTP/3 requires the latest version of OpenLiteSpeed:

For Ubuntu/Debian:

sudo apt update && sudo apt upgrade

For CentOS/RHEL:

sudo yum update && sudo yum upgrade

Then restart the server:

sudo systemctl restart lsws

Access the OpenLiteSpeed WebAdmin:

https://your-server-ip:7080

Navigate to Listeners → Edit your HTTPS listener → Enable QUIC → Save.

Step 3: Edit Configuration File

Open:

/usr/local/lsws/conf/httpd_config.conf

Add the following lines:

quicEnable 1 enableHttp3 1

Save and restart:

sudo systemctl restart lsws

Step 4: Verify HTTP/3 & QUIC Activation

Use curl:

curl -I --http3 https://yourdomain.com

Or in Chrome:

• Open DevTools (Ctrl+Shift+I)
• Navigate to the Network tab
• Confirm h3 appears under the protocol column

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As the web continues to evolve, enabling HTTP/3 and QUIC is a forward-thinking move. These protocols not only improve website speed and security, but also contribute to better SEO rankings, as search engines favor fast-loading sites.

By taking advantage of CyberPanel’s built-in support for HTTP/3 and QUIC, you can significantly enhance your website’s performance, deliver a better user experience, and stay ahead of the competition.

Start optimising your website today and future-proof your hosting infrastructure for the modern web with us.