[stunnel-users] Stunnel Connectivity Issue

Ludolf Holzheid lholzheid at bihl-wiedemann.de
Tue Jun 13 20:07:49 CEST 2017

On Tue, 2017-06-13 22:51:27 +0530, Dheeraj Gautam wrote:
> Hi Browne,
> I am not understand like what config I have to do in stunnel config file.
> As per application it will trigger 8228 port of remote server, but at the momen stunnel is working only when I am trying to telnet localhost on 9233 port.


I'm afraid you confused the directions:

In you configuration file, you told Stunnel to accept connections on
localhost, port 9233 ("accept =").  Then, you told
Stunnel, if such a connection is accepted, to connect to a remote
server at port 8228 ("connect =").

As long as both connections are established, Stunnel will forward data
from localhost to and vice versa, while encrypting the
data in the localhost -> direction and decrypting the
data in the opposite direction ( -> localhost).

With this setup, a client program (such as Thunderbird) sends and
receives plain-text data to/from a Stunnel instance on the same
machine, while a server program on a remote machine (such as the
Google mail server) sends and receives encrypted data to/from Stunnel.

Is this about the setup you have in mind?

Is your application server or client?
Does it send and receive plain-text data or encrypted data?



Ludolf Holzheid
Bihl+Wiedemann GmbH
Floßwörthstraße 41
68199 Mannheim, Germany
Tel: +49 621 33996-0
Fax: +49 621 3392239
mailto:lholzheid at bihl-wiedemann.de
Sitz der Gesellschaft: Mannheim
Geschäftsführer: Jochen Bihl, Bernhard Wiedemann
Amtsgericht Mannheim, HRB 5796

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