[stunnel-users] Stunnel connection from A to B but direction from B to A?

Michal Trojnara Michal.Trojnara at mirt.net
Tue Apr 13 22:51:46 CEST 2010

Carsten Krüger wrote:

> is it possible with stunnel to connect from host A to host B but to
> have the port redirection the other way?

SSL provides a 1:1 cryptographic protection of a TCP connection.  For  
additional services (e.g. multiple data streams) you either need a  
different protocol (e.g. http://www.ietf.org/rfc/rfc4251.txt), or an  
additional proprietary protocol encapsulated within the standard SSL  
(so called "SSL VPNs" take this approach).  Please bear in mind such  
"SSL VPN" is no longer just SSL encryption, as it needs this  
proprietary protocol implemented on both ends.  Stunnel does not break  
SSL this way.


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