[stunnel-users] Tunnel from win32 to Unix

Tue Feb 26 10:48:42 CET 2019

Hi,
What Putty does most probably is not just a ssh connection, but a
redirection like LocalForward, too.

Here, you only try to connect from the client to the server on port 22,
which is the one used by ssh server, and not the port of the database.

You may try to connect directly to the db port if it's supported.
Otherwise, you may setup two stunnel services, one client and one server.

Regards,
Flo

On Tue, Feb 26, 2019 at 9:14 AM Eetu Pikkarainen <eetu.pikkarainen at oulu.fi>
wrote:

> Hi,
> I am a totally newbie with this. We have intranet system in Windows Server
> (32bit) which reads a database (Oracle) situated in Unix machine via a
> tunnel made by Putty.exe. That works well except that the connection gets
> lost every now and then and it must be manually logged in every time. So I
> decided to try stunnel which we used earlier to read email from email
> server.
> However I cannot set the connection successfully. This is what I have
> tried now (among many other alternatives):
>
> [Kanto2]
> client = yes
> accept = 127.0.0.1:1501
> connect = kanto2.oulu.fi:22
> protocolUsername = <username>
> protocolPassword = <password>
>
> stunnel reads the configuration OK except this notification:
>
>   [:] Service [Kanto2] needs authentication to prevent MITM attacks
>
> but when the database is tried to read happens this:
>
>   2019.02.18 13:32:30 LOG5[1]: Service [Kanto2] accepted connection from
> 127.0.0.1:64699
>   2019.02.18 13:32:30 LOG5[1]: s_connect: connected 130.231.240.100:22
>   2019.02.18 13:32:30 LOG5[1]: Service [Kanto2] connected remote server
> from 130.231.241.250:64700
>   2019.02.18 13:32:30 LOG3[1]: SSL_connect: 140770FC: error:140770FC:SSL
> routines:SSL23_GET_SERVER_HELLO:unknown protocol
>   2019.02.18 13:32:30 LOG5[1]: Connection reset: 0 byte(s) sent to TLS, 0
> byte(s) sent to socket
>
> I have tried different protocol alternatives with no help.
> What could be the problem? Is this kind of use even possible?
>
>
>
>
> thanks
>
> Eetu Pikkarainen
> PhD (Ed.), (Title of) Adjunct Prof., University Lecturer (in Education)
> Faculty of Education, University of Oulu, Finland Research Group:
> https://wiki.oulu.fi/display/theored
>
> Latest publications:
>
>     Semiotic Theory of Learning: New Perspectives in the Philosophy of
> Education.
>     By Andrew Stables, Winfried Nöth, Alin Olteanu, Sébastien Pesce and
> Eetu Pikkarainen
>     https://www.taylorfrancis.com/books/e/9781351725170
>
>     Schools in Transition: Linking Past, Present, and Future in
> Educational Practice.
>     Edited by Pauli Siljander, Kimmo Kontio and Eetu Pikkarainen
>
> https://www.sensepublishers.com/catalogs/bookseries/other-books/schools-in-transition/
>
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