FAQ

Quick UDP Internet Connections: HTTP/3

1 min read http3, quic, webhosting

The QUIC (Quick UDP Internet Connections ) transport protocol and HTTP/3 are enabled by default across all DataDachs LiteSpeed webhosting servers.

What Requirements Apply?

  • QUIC / HTTP/3 operates exclusively over encrypted https:// connections.
  • A valid, trusted SSL/TLS certificate is required (such as the free Let’s Encrypt certificate included in cPanel; self-signed certificates are rejected for HTTP/3).
  • Outbound UDP port 443 must not be blocked by the visitor’s local firewall.

How Can I Disable the QUIC Protocol?

You can disable QUIC for a specific website via the .htaccess file in your document root by adding the following directive:

<IfModule LiteSpeed>
    QuicEnable off
</IfModule>

How Can I Verify Whether HTTP/3 Is Active on My Website?

You can test HTTP/3 and QUIC support for your domain using: