Copyright (C) 2010 Trend Micro, Inc.
All rights reserved.

OSSEC HIDS is a free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (version 3) as published by the FSF - Free Software Foundation. Note that this license applies to the source code, as well as decoders, rules and any other data file included with OSSEC (unless otherwise specified).

For the purpose of this license, we consider an application to constitute a “derivative work” or a work based on this program if it does any of the following: (list not exclusive)

• 1- Integrates source code/data files from OSSEC.
• 2- Includes OSSEC copyrighted material.
• 3- Includes/integrates OSSEC into a proprietary executable installer.
• 4- Links to a library or executes a program that does any of the above.

This list is not exclusive, but just a clarification of our interpretation of derived works. These restrictions only apply if you actually redistribute OSSEC (or parts of it).

Source is provided to this software to allow different platform versions to be supported and to provide visibility into how the OSSEC software works. It also allows modifications to be made to allow the software to work in your environment. Feel free to send new software code or rules or any changes to existing OSSEC software or OSSEC rules to dcid@ossec.net for possible incorporation into the main distribution.

By sending these changes to OSSEC or one of the OSSEC-moderated mailing lists or forums, you are granting to the OSSEC copyright owner, Trend Micro, Inc. the unlimited, perpetual, non-exclusive right to reuse, modify, and/or relicense the code on a royalty-free basis. OSSEC will remain available as Open Source, but this granting of license rights is important to ensure the continued success of the OSSEC project. If you wish to specify special license conditions of your potential contributions, please indicate this when you send them.

We don’t consider these to be added restrictions on top of the GPL, but just a clarification of how we interpret “derived works” as it applies to OSSEC. This is similar to the way Linus Torvalds has announced his interpretation of how “derived works” applies to Linux kernel modules. Our interpretation refers only to OSSEC - we don’t speak for any other GPL products.

OSSEC HIDS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

License goal

*taken from GPLv3 preamble

When we speak of free software, we are referring to freedom, not price. The GPLv3 is designed to make sure that you have the freedom to distribute copies of this free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.

To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.For example, if you distribute OSSEC (or parts of it), whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.

The GNU General Public License does not permit incorporating OSSEC (or parts of it) into proprietary programs.

Included software

This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit (http://www.openssl.org/).

This product include software developed by the zlib project
(Jean-loup Gailly and Mark Adler).