[stunnel-users] Hangs when connecting -- advice pls

Małgorzata Olszówka gosia at olszowka.net
Thu Sep 22 12:40:17 CEST 2016


 > 2016.09.20 09:21:35 LOG5[ui]: stunnel 5.35 on 
x86_64-apple-darwin15.4.0 platform
 > 2016.09.20 09:21:35 LOG5[ui]: Compiled with OpenSSL 0.9.8zd 8 Jan 2015
 > 2016.09.20 09:21:35 LOG5[ui]: Running  with OpenSSL 0.9.8zh 14 Jan 2016

> If I use that verbatim I get the error:
> 2016.09.21 06:46:46 LOG3[ui]: SSL_connect: 140740BF: error:140740BF:SSL
> routines:SSL23_CLIENT_HELLO:no protocols available
> In fact it seems like the only security protocol available to me
> is TLSv1, as the presence of the NO_SSLv2 and NO_SSLv3 options have no
> effect (which makes sense: I understand that Stunnel doesn’t use SSL v2
> or v3 these days).  I don’t know if this indicates something untoward..

TLS 1.1 and 1.2 are supported by OpenSSL version > 0.9.8
With OpenSSL 0.9.x can be negotiated only TLSv1, so you can’t set option 
NO_TLSv1, you're right.
Given that your  version of OpenSSL is obsolete, it’s best that you 
upgrade to the latest version.

Regards.

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