Unverified50% confidenceFactExact time
Extended CONNECT carries the :protocol pseudo-header (RFC 8441, RFC 9221) and can establish bidirectional WebSocket or WebTransport tunnels; :protocol=connect-udp indicates a datagram stream carrying UDP semantics over HTTP/3.
1
Sources
50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
Sources
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