On Thu, Apr 18, 2024 at 08:28:13PM -0700, Doug Hardie wrote: > Really off the wall idea - is it possible that the client is trying to establish a QUIC session? Random guesses not grounded in evidence are rarely helpful, this is one such instance. QUIC is over UDP, your server accepts TCP connections. And certificate matching is basically the same in QUIC as in TLS. Best to focus on resolving the incoming TLS alerts from clients that purport problems with validating the server's certificate chain. -- Viktor.