tls_early_post_process_client_hello:unsupported protocol

[Sven Hartge]

Elise <dovecot_ML at cloudzeeland.nl> wrote:

> I just read a line in my logfile that I haven't noticed before:

> Aug 29 22:17:23 <myserver> dovecot[50098]: imap-login: Disconnected: 
> Connection closed: SSL_accept() failed: error:14209102:SSL 
> routines:tls_early_post_process_client_hello:unsupported protocol (no 
> auth attempts in 2 secs): user=<>, rip=104.152.52.31, lip=10.10.10.37, 
> TLS handshaking: SSL_accept() failed: error:14209102:SSL 
> routines:tls_early_post_process_client_hello:unsupported protocol, 
> session=</w+MZ7jKvLhomDQf>

> Is this a TLS 1.3 related issue?

Yes, but: The IP resolves to internettl.org which has the following
blurp on its website: "The InterneTTL is a research project that
identifies servers on the Internet. InterneTTL continuously scans every
host on the Internet providing IT and security teams with realtime
visibility into active servers."

Make from that, what you want.

Grüße,
Sven.

-- 
Sigmentation fault. Core dumped.