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标题:[zeuux-universe] 一个“自由软件变成专有软件,同时社区如何继续保留和发展原来自由软件”的例子

2010年10月13日 星期三 19:30

Bill Xu bill在zeuux.org
星期三 十月 13 19:30:29 CST 2010

之前好多朋友都问过类似的问题,今天正好看到一个实际的例子,供大家参考:

Adito is a web-based SSL VPN server written in Java. It has a 
browser-based AJAX UI which allows easy access to intranet services. 
Adito is a fork of SSL-Explorer. See 
http://openvpn-als.wiki.sourceforge.net/ for info or visit our IRC 
(#adito at freenode.net). For a technical overview, take a look here 
<http://sourceforge.net/apps/trac/openvpn-als/wiki/getting_started_with_openvpn-als_development>. 
For the latest releases, development versions, documentation and help go 
to Adito homepage at

http://sourceforge.net/projects/adito

The Adito release package contains all of the source and most of the 
tools required to build and customise Adito. For installation help take 
a look at other Adito wiki articles.

Adito began life as a fork of the "SSL-Explorer Community Edition" 
1.0.0-rc17, which was discontinued by the firm (3sp) that had developed 
it. A commercial offering called SSL-Explorer Enterprise Edition with 
added functionality was also available. Latest versions of SSL-Explorer 
are closed-source. The exact reasons for this switch in direction are 
not clear. Because the entire SSL-Explorer codebase was written by 3sp 
it they had
the right to close it without violating the GPL license. New versions of 
SSL-Explorer are entirely proprietary.

Adito was forked from SSL-Explorer 1.0.0-rc17 for several reasons:

- To keep the already robust and functional open source codebase from 
decaying
- To reform SSL-Explorer (now Adito) from one company's product and a 
brand into a true community project
- To add new, exiting functionality
- To integrate existing functionality (e.g. sslexplorer-pam) into the 
program without the need to maintain it out of the source tree

SSL-Explorer Community Edition had to modified a bit to avoid legal 
issues. The name - SSL-Explorer - is 3sp's trademark, so it had to 
changed. In fact all references to SSL-Explorer have been removed 
entirely. This means that any SSL-Explorer extensions have to be 
modified slightly to work on Adito, though it's pretty trivial. 
SSL-Explorer also contained non-free icons. These have been replaced 
with free Tango icons from

http://tango.freedesktop.org/Tango_Icon_Library)

and several icons based on them.

Adito is licensed under the GNU General Public License, just like 
SSL-Explorer Community Edition. GPL is a license that allows the free 
use of the software for commercial/non-commercial usage, however you 
must not incorporate code from this software into a commercial product, 
unless your commercial product is also to be licensed under the terms of 
the GPL. See openvpn-als/notes/LICENSE.txt for the full license text. 
Adito also includes other components under licenses other than the GPL 
(see openvpn-als/notes).


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