Choose HTTP protocols per server

Edit a server to enable HTTP/1, HTTP/2, or HTTP/3 individually. When HTTP/3 is enabled, you can also choose whether FlowGuard advertises it with an Alt-Svc header on HTTPS responses.

These settings require FlowGuard Proxy v0.7.0 or newer. HTTP/3 uses QUIC over UDP port 443, so allow that traffic through the host and upstream firewalls before enabling it.