ZyXEL Communications NSA325 User Manual page 503

You do not have to release any of your source code.
You do not have to reveal or make public any changes to the libcurl source
code.
You do not have to reveal or make public that you are using libcurl within
your app.
As can be seen here: http://curl.haxx.se/docs/companies.html and
elsewhere, more and more companies are discovering the power
of libcurl and take advantage of it even in commercial environments.
This Product includes httpd software under below license
Apache HTTP Server
Copyright 2008 The Apache Software Foundation.
This product includes software developed at
The Apache Software Foundation (http://www.apache.org/).
Portions of this software were developed at the National Center
for Supercomputing Applications (NCSA) at the University of
Illinois at Urbana-Champaign.
This software contains code derived from the RSA Data Security
Inc. MD5 Message-Digest Algorithm, including various
modifications by Spyglass Inc., Carnegie Mellon University, and
Bell Communications Research, Inc (Bellcore).
Regular expression support is provided by the PCRE library package,
which is open source software, written by Philip Hazel, and copyright
by the University of Cambridge, England. The original software is
available from
ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/
Apache License
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
Version 2.0, January 2004