Help Center/ Content Delivery Network/ User Guide/ Custom Domain Name Configuration/ HTTPS Settings/ QUIC
Updated on 2025-06-16 GMT+08:00
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QUIC

This chapter describes what is QUIC and how to configure QUIC.

What Is QUIC?

Quick UDP Internet Connections (QUIC) is a UDP-based transport protocol. It has the following features:

  • It has excellent performance in weak networks and can provide available services in the case of packet loss and severe network delay.
  • All QUIC traffic is encrypted, improving transmission security.
  • It reduces the transmission and connection delay and prevents network congestion.

Supported Version

IETF-v1 (H3)

Prerequisites

An international HTTPS certificate has been configured. For details, see Configuring an HTTPS Certificate.
  • Disabling the HTTPS certificate will disable QUIC.
  • After configuring the HTTPS certificate, wait about 5 minutes for the configuration to complete and then enable QUIC.

Precautions

  • QUIC cannot be enabled for domain names with special configurations.
  • QUIC cannot be used for origin pull.
  • This function is in OBT and is available for free trial.
  • To change the certificate type from International to Chinese (SM2), QUIC should be disabled first.
  • If you configure two certificates for a domain name, QUIC takes effect only for the international certificate.

Procedure

  1. Log in to Huawei Cloud console. Choose Service List > Content Delivery & Edge Computing > Content Delivery Network.

    The CDN console is displayed.

  2. In the navigation pane, choose Domains.
  3. In the domain list, click the target domain name or click Configure in the Operation column.
  4. Click the HTTPS Settings tab.
  5. In the QUIC area, switch on QUIC.
    Figure 1 QUIC

How Do I Check Whether a Client Request Uses the QUIC or HTTP Protocol?

After you enable QUIC, clients can use it to access your acceleration domain name. The following uses the Chrome browser as an example to describe how to check the client access protocol.

  1. Open the Chrome browser and access the acceleration domain name for which QUIC has been enabled.
  2. Press F12 or right-click the page and choose Inspect. Then click the Network tab.

    If h3 is displayed in the Protocol column, the request uses QUIC. If the Protocol column is invisible, refresh the page, right-click on a resource, and choose Header Options > Protocol.

Parent topic: HTTPS Settings