As noted, Ethereal is licensed under the GNU General Public License. The GPL imposes conditions on your use of GPL'ed code in your own products; you cannot, for example, make a "derived work" from Ethereal, by making modifications to it, and then sell the resulting derived work and not allow recipients to give away the resulting work.

Yes, if, for example, you mean "I work for a commercial organization; can I use Ethereal to capture and analyze network traffic in our company's networks or in our customer's networks?"

Ethereal can read live data from Ethernet, Token-Ring, FDDI, serial (PPP and SLIP) (if the OS on which it's running allows Ethereal to do so), 802.11 wireless LAN (if the OS on which it's running allows Ethereal to do so), ATM connections (if the OS on which it's running allows Ethereal to do so), and the "any" device supported on Linux by recent versions of libpcap.

A#1.4: The GNO documentation specifies that the minimum requirement is an Apple IIGS with 1.25 MB of memory and a 3.5" disk drive. Realistically (especially with all the third-party add-ons), a hard drive (or other large mass storage device) should be considered a necessity. An accelerator and additional memory is recommended. There is not an official "minimum disk space" requirement as yet. When this information becomes available, it will be added to this FAQ.

As noted, Wireshark is licensed under the GNU General Public License. The GPL imposes conditions on your use of GPL'ed code in your own products; you cannot, for example, make a "derived work" from Wireshark, by making modifications to it, and then sell the resulting derived work and not allow recipients to give away the resulting work.

Yes. Any product conforming to the J2EE 1.3 or later specifications can be used to run this benchmark. CTS certification ensures that the application server being tested is a J2EE technology-based application server and not a benchmark-special application server that is crafted specifically for SPECjAppServer2004. The CTS certification is validated by Sun Microsystems, Inc.

Older versions of the Red Hat RPMs for Ethereal put only the non-GUI components into the ethereal RPM, the fact that Ethereal is a GUI program nonwithstanding; newer versions make it a bit clearer by giving that RPM a name starting with ethereal-base.

The source code to your product does not have to be Open Source as long as it does not contain fragments of OpenGatekeeper or OpenH323 source.

Probably. libsrs2 is released under the union of the GPL version 2 and the BSD licenses. You may choose which license to use with this software. If neither of these licenses is adequate for your needs, plesae contact Shevek at srs [ta] anarres.org to ask for alternative licensing terms and support.

The English pronunciation can be found in Merriam-Webster's online dictionary at http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=ethereal. According to the book "Computer Networks" by Andrew Tannenbaum, Ethernet was named after the "luminiferous ether" which was once thought to carry electromagnetic radiation. Taking that into consideration, Ethereal seemed like an appropriate name for something that started out as an Ethernet analyzer.

The Rolls Ethereal list people on the Rialto, at least name and electronic address, and often interests, location, and awards. The Rolls are maintained by Justin du Coeur <rolls@waks.org> They are available via World Wide Web at http://www.waks.org/rolls

I see it as a triple pun. The library is insubstantial, existing only "in the ether"; the subject matter is spiritual; and the medium is, well, an ethernet—at least on this end. Some people have complained about the word Ethereal—that it connotes "airy" or "unreal." In fact, I changed the name to "Christian Classics Electronic Library" for a while, but that seems rather boring and forgettable.

When it approved the seaway and power project, the IJC appointed the International St. Lawrence River Board of Control (ISLRBC) to oversee the regulation of water levels and flows and ensure that the Orders of Approval are followed. One assignment carried out by the ISLRBC was to develop a regulation plan to determine flows through the project that are consistent with the Orders of Approval.

m0n0wall is under the BSD license, which basically means that you can do whatever you want with it (including modifying and selling it) for free, as long as the original copyright notice and license appear somewhere in the documentation and/or the software itself. There are no warranties of any kind though. Although you don't have to pay anything for m0n0wall even if you sell it, if you do find yourself making money by selling m0n0wall-based products, a donation would be very much appreciated.

Yes. Squirrel is distributed under zlib/libpng license and is 100% free for both commercial and non-commercial products.

Sure. Minify is distributed under the New BSD License, which means that you're free to use, modify, and redistribute Minify or derivative works thereof, even for commercial purposes, as long as you comply with a few simple requirements. See the LICENSE file for details.

Support for particular protocols is added to Ethereal as a result of people contributing that support; no formal plans for adding support for particular protocols in particular future releases exist. If a network analyzer writes out files in a format already supported by Ethereal (e.g., in libpcap format), Ethereal may already be able to read them, unless the analyzer has added its own proprietary extensions to that format.

Ethereal can only capture on devices supported by libpcap/WinPcap. On most OSes, only devices that can act as network interfaces of the type that support IP are supported as capture devices for libpcap/WinPcap, although the device doesn't necessarily have to be running as an IP interface in order to support traffic capture. On Linux and FreeBSD, libpcap 0.

The most likely reason for this is that Ethereal is trying to look up an IP address in the capture to convert it to a name (so that, for example, it can display the name in the source address or destination address columns), and that lookup process is taking a very long time. Ethereal calls a routine in the OS of the machine on which it's running to convert of IP addresses to the corresponding names.

Yes. There are two different categories of PhysioToolkit code, and the rules for using them are slightly different. The WFDB library is free under the GNU Lesser General Public License (LGPL). The LGPL permits you to use (or sell, or give away) the library with your own code. The only significant restriction is that you must make the sources for the library itself freely available. You do not need to disclose the sources for your own code simply because you have used the WFDB library with it.