A QUICker SASE client: re-building Proxy Mode

Summary

The article outlines the challenges faced by security teams when implementing proxy modes in SASE environments, particularly the performance issues associated with traditional TCP implementations. It details the transition from a WireGuard-based architecture to a QUIC-based solution, highlighting the benefits of direct L4 proxying. By leveraging QUIC and HTTP/3, the new architecture eliminates the inefficiencies of smoltcp and improves user experience through enhanced congestion control and flow management. The improvements lead to significant increases in download and upload speeds while reducing latency, making it particularly beneficial for high-bandwidth applications and environments requiring zero trust security.

Key Learnings

• 1The transition from L3 to L4 proxying using QUIC can drastically improve performance by eliminating unnecessary translation layers.
• 2Utilizing HTTP/3's capabilities allows for better handling of modern web traffic and enhances user experience in high-demand scenarios.
• 3The architectural shift not only improves speed but also allows for fine-tuning of QUIC parameters to optimize performance in various environments.
• 4By removing reliance on smoltcp, the new implementation benefits from modern TCP features that enhance overall network efficiency.
• 5The update specifically addresses common use cases in zero trust environments, ensuring security does not come at the cost of performance.

Who Should Read This

Senior Network Engineers and Security Architects optimizing SASE solutions for performance and security in enterprise environments.

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