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Message-ID: <b31136f2-3401-34a8-ba89-7528c906bcd3@tsoft.com>
Date: Mon, 8 May 2023 00:31:09 -0700
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To: cygwin@cygwin.com
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Subject: OpenSSL failure in Cygwin: SSL_set_tlsext_host_name returns 1
 (SSL_TLSEXT_ERR_ALERT_WARNING)
From: Yuri via Cygwin <cygwin@cygwin.com>
Reply-To: Yuri <yuri@rawbw.com>
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I've built the proxytunnel project in Cygwin 
(https://github.com/proxytunnel/proxytunnel).

It is usually used to tunnel ssh through https using the https CONNECT 
command.


The command "proxytunnel --no-check-certificate -E -p 
{https-proxy-host}:{https-proxy-port} -d 127.0.0.1:22" works on Linux 
and BSD.


However, it fails in Cygwin with the exit code 1 
(SSL_TLSEXT_ERR_ALERT_WARNING), which causes this error message in 
proxytunnel:

 > SSL_set_tlsext_host_name returned: 1 (0x1). TLS SNI error, giving up


This prevents proxytunnel from being able to connect to the remote peer.


What might be wrong?


Thank you,

Yuri


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