• Must have QUIC enabled in GUI/conf
• Must use either Chrome or Opera with QUIC enabled
• Must not use self-signed certificates
• QUIC will not work with a proxy front end like CloudFlare

• Navigate to WebAdmin Console > Configuration > Listeners and press the Add button.
• Choose HTTP then press the Next button.
• Set Listener Name to LS-443.
• Set Port to 443.
• Set Secure to Yes.
• Press the Save button.

• While still in Listener Configuration, select the SSL tab.
• Point Private Key File, Certificate File and CA Certificate File to your certificate file location.

• On the same page, scroll down to Security Features
• Set Enable QUIC to Yes

QUIC (Quick UDP Internet Connections) runs a stream-multiplexing protocol over Transport Layer Security (TLS) on top of UDP instead of TCP. Be sure you've enabled the port with both TCP and UDP.

There’s a Chrome extension which will allow you to see the protocols at work on any website. Install HTTP/2 and SPDY indicator, and you will see a lightning bolt in the Chrome toolbar. Blue indicates HTTP/2 is enabled. Green indicates HTTP/2 + QUIC. Hover over the lightning bolt to see a more detailed list of protocols in action.