tailieunhanh - Open Source Security Tools : Practical Guide to Security Applications part 42

Open Source Security Tools : Practical Guide to Security Applications part 42. Few frontline system administrators can afford to spend all day worrying about security. But in this age of widespread virus infections, worms, and digital attacks, no one can afford to neglect network defenses. Written with the harried IT manager in mind, Open Source Security Tools is a practical, hands-on introduction to open source security tools. | Page 389 Friday June 25 2004 1 36 PM Appendix A Open Source Licenses This appendix contains both the GNU General Public License and the BSD Open Source License. You can get these on the Web from licenses and licenses respectively. The GNU General Public License GPL GNU GENERAL PUBLIC LICENSE Version 2 June 1991 Copyright C 1989 1991 Free Software Foundation Inc. 59 Temple Place Suite 330 Boston MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast the GNU General Public License is intended to guarantee your freedom to share and change free software to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation s software and to any other program whose authors commit to using it. Some other Free Software Foundation software is covered by the GNU Library General Public License instead. You can apply it to your programs too. 389 Page 390 Friday June 25 2004 1 36 PM 390 Appendix A Open Source Licenses When we speak of free software we are referring to freedom not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software and charge for this service 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 make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software or if you modify it. For example if you distribute copies of such a program whether gratis or