ZyXEL Communications NSA 210 User Manual page 569

Appendix E Open Source Licences
Except as contained in this notice, the name of a copyright holder shall not
be used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization of the copyright holder.
License Issues
Curl and libcurl are released under a MIT/X derivate license. The license is
very liberal and should not impose a problem for your project. This section
is just a brief summary for the cases we get the most questions. (Parts of
this section was much enhanced by Bjorn Reese.)
We are not lawyers and this is not legal advice. You should probably consult
one if you want true and accurate legal insights without our prejudice.
6.1 I have a GPL program, can I use the libcurl library?
Yes!
Since libcurl may be distributed under the MIT/X derivate license, it can be
used together with GPL in any software.
6.2 I have a closed-source program, can I use the libcurl library?
Yes!
libcurl does not put any restrictions on the program that uses the library.
6.3 I have a BSD licensed program, can I use the libcurl library?
Yes!
libcurl does not put any restrictions on the program that uses the library.
6.4 I have a program that uses LGPL libraries, can I use libcurl?
Yes!
The LGPL license doesn't clash with other licenses.
6.5 Can I modify curl/libcurl for my program and keep the changes secret?
Yes!
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NSA210 User's Guide