Disabling HTTP/2 with Raw TLS Manipulation
TLS ALPN Manipulation for HTTP/2 Disabling Overview This document provides a technical deep-dive into how our HTTP/1.1 enforcing proxy intercepts and modifies TLS handshake traffic to force HTTP/1.1 connections by removing HTTP/2 (h2) from ALPN (Application Layer Protocol Negotiation) extensions. Architecture Client ──TLS──> Proxy ──Modified TLS──> Upstream ──TLS──> Target Server ClientHello ClientHello (no h2) HTTP/1.1 Only The proxy sits between the client and upstream server, intercepting the initial TLS ClientHello message, modifying the ALPN extension to remove HTTP/2 protocol advertisement, and forwarding the modified handshake....