Failed-error-during-websocket-handshake-connection-header-is-missing May 2026

Ensure mod_proxy and mod_proxy_wstunnel are enabled. Use a RewriteRule in your VirtualHost to pass WebSocket traffic:

Managed services often strip headers; ensure WebSocket support is enabled: : Enable Stickiness for polling fallbacks. Azure App Service : Toggle WebSockets on in configuration. 💻 Local Development Protocol : Ensure using ws:// or wss:// . Ensure mod_proxy and mod_proxy_wstunnel are enabled

Which or server framework are you currently using to host this application? Ensure mod_proxy and mod_proxy_wstunnel are enabled