Full Support for HTTP/3 Protocol

AdguardPrivate now fully supports the HTTP/3 protocol, bringing faster and more secure internet experiences to users
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We are pleased to announce that AdguardPrivate now fully supports the HTTP/3 protocol. All existing users will automatically be upgraded to enjoy the performance improvements brought by HTTP/3, without any additional configuration required.

Important Update Notes

  • iOS Users: You can now use HTTP/3 directly through the DoH protocol, enjoying lower network latency
  • Android Users: Due to system limitations, the DoT protocol is still in use, but support for HTTP/3 will be available after Google’s future updates
  • Performance Improvement: The initial response time is significantly improved compared to HTTP/2, with faster connection establishment
  • Smart Switching: In network environments that do not support HTTP/3, the system will automatically switch to HTTP/2 to ensure service stability

Access to h3

In-Depth Analysis of HTTP/3 Technology

HTTP/3, as the latest version of the HTTP protocol, is based on Google’s QUIC transport protocol and brings several innovative technical advantages:

Core Features

  1. QUIC Protocol Based on UDP

    • Significantly reduces connection establishment time
    • Improved multiplexing capabilities
    • More intelligent packet loss handling mechanism

  2. Optimized Performance

    • Zero handshake delay (0-RTT)
    • Improved congestion control
    • Support for connection migration

  3. Enhanced Security

    • Integrated with TLS 1.3
    • Encrypted handshake process
    • Reduced risk of man-in-the-middle attacks

Connection Process Comparison

Response Time Comparison

Connection Establishment Process Comparison

Usage Recommendations

  • Ensure your client supports the HTTP/3 protocol
  • Keep your client version updated
  • In restricted network environments, the system will automatically downgrade to HTTP/2

Precautions

  • Network traffic in some regions may restrict UDP, affecting HTTP/3 performance
  • Performance may vary in different network environments
  • The system will automatically select the optimal protocol based on network conditions

References