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2 The text that follows is the GNU General Public License, Version 2 (GPL V2)
3 and governs your use, modification and/or distribution of SNORT.
5 Section 9 of the GPL V2 acknowledges that the Free Software Foundation may
6 publish revised and/or new versions of the GPL V2 from time to time. Section 9
7 further states that a licensee of a program subject to the GPL V2 could be
8 free to use any such revised and/or new versions under two different scenarios:
10 1. "Failure to Specify." Section 9 of the GPL V2 allows a licensee of a
11 program governed by an unspecified version of the General Public License to
12 choose any version of the General Public License ever published by the Free
13 Software Foundation to govern his or her use of such program.
15 This provision is not applicable to your use of SNORT because we have
16 expressly stated in a number of instances that any third party's use,
17 modification or distribution of SNORT is governed by GPL V2.
19 2. "Any Later Version." At the end of the terms and condition of the GPL V2 is
20 a section called "How to Apply these Terms to Your New Program," which
21 provides guidance to a developer on how to apply the GPL V2 to a third party's
22 use, modification and/or distribution of his/her program. Among other things,
23 this guidance suggests that the developer attach certain notices to the
24 program. Of particular importance is the following notice:
26 "This program is free software; you can redistribute it and/or modify it under
27 the terms of the GNU General Public License as published by the Free Software
28 Foundation; either version 2 of the License, or (at your option) any later
31 Thus if a developer follows strictly the guidance provided by the Free
32 Software Foundation, Section 9 of the GPL V2 provides the licensee the option
33 to either use, modify or distribute the program under GPL V2 or under any
34 later version published by the Free Software Foundation.
36 SNORT is an open source project that is governed exclusively by the GPL V2
37 and any third party desiring to use, modify or distribute SNORT must do so by
38 strictly following the terms and conditions of GPL V2. Anyone using, modifying
39 or distributing SNORT does not have the option to chose to use, modify or
40 distribute SNORT under any revised or new version of the GPL, including
41 without limitation, the GNU General Public License Version 3.
43 For ease of reference, the comparable notice that is used with SNORT
44 (contained in the 'README' file) is as follows:
46 "This program is free software; you can redistribute it and/or modify it under
47 the terms of the GNU General Public License Version 2 as published by the Free
48 Software Foundation. You may not use, modify or distribute this program under
49 any other version of the GNU General Public License."
51 If you have any questions about this statement, please feel free to email
55 GNU GENERAL PUBLIC LICENSE
56 Version 2, June 1991
58 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
60 Everyone is permitted to copy and distribute verbatim copies
61 of this license document, but changing it is not allowed.
65 The licenses for most software are designed to take away your
66 freedom to share and change it. By contrast, the GNU General Public
67 License is intended to guarantee your freedom to share and change free
68 software--to make sure the software is free for all its users. This
69 General Public License applies to most of the Free Software
70 Foundation's software and to any other program whose authors commit to
71 using it. (Some other Free Software Foundation software is covered by
72 the GNU Library General Public License instead.) You can apply it to
73 your programs, too.
75 When we speak of free software, we are referring to freedom, not
76 price. Our General Public Licenses are designed to make sure that you
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80 in new free programs; and that you know you can do these things.
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84 These restrictions translate to certain responsibilities for you if you
85 distribute copies of the software, or if you modify it.
87 For example, if you distribute copies of such a program, whether
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89 you have. You must make sure that they, too, receive or can get the
90 source code. And you must show them these terms so they know their
93 We protect your rights with two steps: (1) copyright the software, and
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95 distribute and/or modify the software.
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113 GNU GENERAL PUBLIC LICENSE
114 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
116 0. This License applies to any program or other work which contains
117 a notice placed by the copyright holder saying it may be distributed
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126 Activities other than copying, distribution and modification are not
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131 Whether that is true depends on what the Program does.
133 1. You may copy and distribute verbatim copies of the Program's
134 source code as you receive it, in any medium, provided that you
135 conspicuously and appropriately publish on each copy an appropriate
136 copyright notice and disclaimer of warranty; keep intact all the
137 notices that refer to this License and to the absence of any warranty;
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141 You may charge a fee for the physical act of transferring a copy, and
142 you may at your option offer warranty protection in exchange for a fee.
144 2. You may modify your copy or copies of the Program or any portion
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157 c) If the modified program normally reads commands interactively
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159 interactive use in the most ordinary way, to print or display an
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162 a warranty) and that users may redistribute the program under
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166 the Program is not required to print an announcement.)
168 These requirements apply to the modified work as a whole. If
169 identifiable sections of that work are not derived from the Program,
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281 be a consequence of the rest of this License.
283 8. If the distribution and/or use of the Program is restricted in
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312 NO WARRANTY
314 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
315 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
316 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
317 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
318 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
319 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
320 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
321 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
322 REPAIR OR CORRECTION.
324 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
325 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
326 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
327 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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329 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
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332 POSSIBILITY OF SUCH DAMAGES.
334 END OF TERMS AND CONDITIONS
336 How to Apply These Terms to Your New Programs
338 If you develop a new program, and you want it to be of the greatest
339 possible use to the public, the best way to achieve this is to make it
340 free software which everyone can redistribute and change under these terms.
342 To do so, attach the following notices to the program. It is safest
343 to attach them to the start of each source file to most effectively
344 convey the exclusion of warranty; and each file should have at least
345 the "copyright" line and a pointer to where the full notice is found.
347 <one line to give the program's name and a brief idea of what it does.>
348 Copyright (C) 19yy <name of author>
350 This program is free software; you can redistribute it and/or modify
351 it under the terms of the GNU General Public License as published by
352 the Free Software Foundation; either version 2 of the License, or
353 (at your option) any later version.
355 This program is distributed in the hope that it will be useful,
356 but WITHOUT ANY WARRANTY; without even the implied warranty of
357 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
358 GNU General Public License for more details.
360 You should have received a copy of the GNU General Public License
361 along with this program; if not, write to the Free Software
362 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
366 Also add information on how to contact you by electronic and paper mail.
368 If the program is interactive, make it output a short notice like this
369 when it starts in an interactive mode:
371 Gnomovision version 69, Copyright (C) 19yy name of author
372 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
373 This is free software, and you are welcome to redistribute it
374 under certain conditions; type `show c' for details.
376 The hypothetical commands `show w' and `show c' should show the appropriate
377 parts of the General Public License. Of course, the commands you use may
378 be called something other than `show w' and `show c'; they could even be
379 mouse-clicks or menu items--whatever suits your program.
381 You should also get your employer (if you work as a programmer) or your
382 school, if any, to sign a "copyright disclaimer" for the program, if
383 necessary. Here is a sample; alter the names:
385 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
386 `Gnomovision' (which makes passes at compilers) written by James Hacker.
388 <signature of Ty Coon>, 1 April 1989
389 Ty Coon, President of Vice
391 This General Public License does not permit incorporating your program into
392 proprietary programs. If your program is a subroutine library, you may
393 consider it more useful to permit linking proprietary applications with the
394 library. If this is what you want to do, use the GNU Library General
395 Public License instead of this License.