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    Edge Security Acceleration:Protocol optimization

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    Edge Security Acceleration:Protocol optimization

    Last Updated:Mar 05, 2025

    If you enable the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) feature and correctly configure the required certificate for your website, Edge Security Acceleration (ESA) automatically turns on the HTTP/2 and HTTP/3 (QUIC) switches to allow you to use the HTTP/2 and HTTP/3 protocols.

    What are HTTP/2 and HTTP/3

    HTTP/2

    HTTP/2, originally named HTTP/2.0, is the first new version of HTTP since HTTP/1.1. HTTP/2 supports binary framing, multiplexing, and header compression. This protocol improves web performance and reduces network latency.

    HTTP/3 (QUIC)

    Quick UDP Internet Connections (QUIC) is a transport layer protocol that provides the same level of security as TLS/SSL. QUIC ensures lower connection and transmission latency. QUIC is developed based on UDP and has an excellent performance when network connections are weak.

    When packet loss and network latency issues are severe, QUIC can still ensure service availability. QUIC can implement different congestion control algorithms for applications, regardless of the operating system or kernel that is used. Compared with TCP, QUIC supports flexible changes based on business requirements. QUIC is a suitable alternative when TCP optimization encounters bottlenecks.

    Before you begin

    ESA supports IETF QUIC and Google QUIC (gQUIC). Supported versions of gQUIC are Q39, Q43, and Q46.

    • IETF QUIC is a standard Internet protocol.

    • IETF QUIC is compatible with gQUIC versions G39, Q43, and Q46. We recommend that you use IETF QUIC.

    Enable protocol optimization

    1. In the ESA console, choose Websites and click the website name you want to manage.

    2. In the left-side navigation pane, click Speed and Network, and choose the Speed Optimization tab.

    3. Enable HTTP/2, HTTP/2 to Origin, or HTTP/3 (QUIC) based on your business requirements.

      • HTTP/2: Based on the existing HTTPS, HTTP/2 uses multiplexing, header compression and other technologies to further improve website performance and accelerate resource loading. HTTP/2 also provides high compatibility.

        Note

        The current configuration takes effect on all domain names of the website. If you want to enable HTTP/2 to Origin for only a specified domain name, add a rule for the domain name.

      • HTTP/3 (QUIC): QUIC is developed based on UDP and is the core of HTTP/3. HTTP/3 (QUIC) can offer faster connection establishment and more stable data transmission in unstable network environments or mobile environments.