[stunnel-users] Stunnel License
Michal.Trojnara at mobi-com.net
Wed Sep 24 16:52:30 CEST 2008
"Bansal, Gaurav (Gaurav)" <gbansal at avaya.com> wrote:
> We are planning to use Stunnel to encrypt traffic between Apache mod_jk
> and AJP connector of JBoss Tomcat.
Using stunnel does not create a derivative work. GPL license does not
restrict the way you *use* stunnel. It only restricts the way you
> It seems that Stunnel uses OpenSSL APIs. Since Stunnel is available
> under GPL license, the license terms prevents us from using Stunnel in
> our product since it exposes OpenSSL which is also available under GPL
Your product "exposes OpenSSL"? I'm not sure what you mean.
AFAIK OpenSSL is not available under GPL license.
> I would like to know if there is also a commercial license available for
> stunnel? I would appreciate if you can throw pointers on how to package
> Stunnel with a commercial product.
You can package stunnel with a commercial product as long as it does not
create a derivative work. Roughly speaking creating derivative work is
linking your code against stunnel. See GPL license for the detailed
Yes - commercial licenses are available, but it looks like you don't need
> We would distribute stunnel binary along with our product. Given the
> scenario I have mentioned do you foresee legal problems in usage of
Just make sure to distribute stunnel source and its license along with your
> Specifically I am concerned if Stunnel states that compiling, linking,
> and/or using OpenSSL is allowed
Stunnel license allows linking with OpenSSL. See:
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