Configuring HTTP/3 to work through a TCP proxy

« Back to Knowledge Base

HTTP/3 uses UDP by default. Since NetDetour supports only TCP proxying, HTTP/3 connections may bypass the proxy.

To force web browsers to use TCP-based HTTP/2 or earlier instead, add a "Block UDP" rule that applies to your web browser. This rule must precede the browser's "Proxy" rule.

When UDP is unavailable, modern browsers automatically fall back to TCP-based HTTP protocols, allowing the traffic to work correctly through the proxy.