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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 AT cygwin DOT com
Subject:	OpenSSL failure in Cygwin: SSL_set_tlsext_host_name returns 1
	(SSL_TLSEXT_ERR_ALERT_WARNING)
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From:	Yuri via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Yuri <yuri AT rawbw DOT com>
Sender:	"Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

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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