4 ms·

Wait, why wouldn't they know the port? I'm not aware of any cases where the TCP header itself is encrypted.

• fjni 4y ago
  You are correct. The port is part of the tcp header and my statement above is incorrect!
• kevincox 4y ago
  99% of consumer traffic is on 443 these days (citation needed)
  • robocat 4y ago
    HTTP3 uses UDP and doesn’t have to use the same port, although I presume it does. “A browser first connects the server with HTTP/2 To discover the service. The server responses with an Alt-Svc header, including the port for HTTP/3, such as Alt-Svc: h3-29=":443"”
    • Avamander 3y ago
      This changes with HTTPS DNS records, browsers can make a H2/H3 connection straight if they get the hints.
• deleted 4y ago
  [deleted]