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In computing, Wireshark (formerly known as Ethereal) is a free software protocol analyzer, or "packet sniffer" application, used for network troubleshooting, analysis, software and protocol development, and education. It has all of the standard features of a protocol analyzer. In June 2006 the project was renamed from Ethereal due to trademark issues. [1] Image File history File links Wireshark_Icon. ...
Image File history File links Download high-resolution version (1024x742, 153 KB) Wireshark is licensed under the GPL. This is a screenshot of copyrighted computer software, and the copyright for it is most likely held by the author(s) or the company that created the software. ...
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Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ...
An operating system (OS) is the software that manages the sharing of the resources of a computer and provides programmers with an interface used to access those resources. ...
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NetBSD is a freely redistributable, open source version of the Unix-like BSD computer operating system. ...
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Mac OS X (IPA: ) is a line of graphical operating systems developed, marketed, and sold by Apple Inc. ...
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Computer software can be organized into categories based on common function, type, or field of use. ...
A packet sniffer (also known as a network analyzer or protocol analyzer or, for particular types of networks, an Ethernet sniffer or wireless sniffer) is computer software or computer hardware that can intercept and log traffic passing over a digital network or part of a network. ...
A software license is a legal agreement which may take the form of a proprietary or gratuitous license as well as a memorandum of contract between a producer and a user of computer software. ...
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A packet sniffer (also known as a network analyzer or protocol analyzer or, for particular types of networks, an Ethernet sniffer or wireless sniffer) is computer software or computer hardware that can intercept and log traffic passing over a digital network or part of a network. ...
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Computer networks may be classified according to the network layer at which they operate according to some basic reference models that are considered to be standards in the industry such as the seven layer OSI reference model and the four layer Internet Protocol Suite model. ...
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The functionality Wireshark provides is very similar to tcpdump, but it has a GUI front-end, and many more information sorting and filtering options. It allows the user to see all traffic being passed over the network (usually an Ethernet network but support is being added for others) by putting the network card into promiscuous mode. tcpdump is a common computer network debugging tool that runs under the command line. ...
GUI can refer to the following: GUI is short for graphical user interface, a term used to describe a type of interface in computing. ...
In their most general meanings, the terms front-end and back-end refer to the initial and the end stages of a process flow. ...
Ethernet is a large, diverse family of frame-based computer networking technologies that operate at many speeds for local area networks (LANs). ...
Promiscuous mode, in computing, refers to a configuration of a network card wherein a setting is enabled so that the card passes all traffic it receives to the CPU rather than just packets addressed to it, a feature normally used for packet sniffing. ...
Wireshark is released under the GNU General Public License, and it uses the cross-platform GTK+ widget toolkit. It runs on Unix and Unix-like systems, including Linux, Solaris, FreeBSD, NetBSD, OpenBSD and Mac OS X (although GTK+ only works with X11 on Mac OS X, so the user will need to run an X server such as X11.app), and on Windows. The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ...
GTK+, or the GIMP Toolkit, is one of the two most popular widget toolkits for the X Window System for creating graphical user interfaces. ...
Filiation of Unix and Unix-like systems Unix (officially trademarked as UNIX®, sometimes also written as or ® with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy. ...
Diagram of the relationships between several Unix-like systems A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification. ...
This article is about operating systems that use the Linux kernel. ...
Solaris is a computer operating system developed by Sun Microsystems. ...
FreeBSD is a Unix-like free operating system descended from AT&T UNIX via the Berkeley Software Distribution (BSD) branch through the 386BSD and 4. ...
NetBSD is a freely redistributable, open source version of the Unix-like BSD computer operating system. ...
OpenBSD is a Unix-like computer operating system descended from Berkeley Software Distribution (BSD), a Unix derivative developed at the University of California, Berkeley. ...
Mac OS X (IPA: ) is a line of graphical operating systems developed, marketed, and sold by Apple Inc. ...
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X11. ...
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Wireshark is a software that "understands" the structure of different network protocols. Thus it's able to display encapsulation and single fields and interpret their meaning. Wireshark uses pcap to capture packets, so it can only capture on networks supported by pcap. pcap is an application programming interface for packet capturing. ...
History Out of necessity, Gerald Combs (a computer science graduate of the University of Missouri-Kansas City) started writing a program called Ethereal so that he could have a tool to capture and analyze packets; he released the first version around 1998. Pretty soon, this GPLed protocol analyzer caught on. As of now there are over 500 contributing authors while Gerald continues to maintain the overall code and issues releases of new versions. The entire list of authors is available from Wireshark's web-site. Gerald Combs, a computer science graduate of the University of Missouri-Kansas City, was the creator and lead developer of Ethereal which was first released in 1998. ...
The University of Missouri-Kansas City (abbreviated UMKC) is an institution of higher learning located in Kansas City, Missouri. ...
The name was changed to Wireshark in June, 2006, because creator and lead developer Gerald Combs could not keep using the Ethereal trademark (which was then owned by his old employer, Network Integration Services) when he changed jobs. He still held copyright on most of the source code (and the rest was redistributable under the GNU GPL), so he took the Subversion repository for Ethereal and used it as the basis for the Subversion repository of Wireshark. Gerald Combs, a computer science graduate of the University of Missouri-Kansas City, was the creator and lead developer of Ethereal which was first released in 1998. ...
In computing, Ethereal (i-thir-E-&l) is a protocol analyzer, or packet sniffer application, used for network troubleshooting, analysis, software and protocol development, and education. ...
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In computing, Subversion (SVN) is a version control system (VCS) initiated in 2000 by CollabNet Inc. ...
It appears that Ethereal development has ceased, and an Ethereal security advisory recommended switching to Wireshark.
eWEEK Labs named Wireshark one of "The Most Important Open-Source Apps of All Time" as of May 2, 2007. [2]
Features - Data can be captured "from the wire" from a live network connection or read from a capture file.
- Live data can be read from Ethernet, FDDI, PPP, token ring, IEEE 802.11, Classical IP over ATM, and loopback interfaces (at least on some platforms; not all of those types are supported on all platforms).
- Captured network data can be browsed via a GUI, or via the terminal (command line) version of the utility, tshark.
- Captured files can be programmatically edited or converted via command-line switches to the "editcap" program.
- Display filters can also be used to selectively highlight and color packet summary information.
- Data display can be refined using a display filter.
- Hundreds of protocols can be dissected.
Ethernet is a large, diverse family of frame-based computer networking technologies that operate at many speeds for local area networks (LANs). ...
In computer networking, fiber-distributed data interface (FDDI) is a standard for data transmission in a local area network that can extend in range up to 200 km (124 miles). ...
In computing, the Point-to-Point Protocol, or PPP, is commonly used to establish a direct connection between two nodes. ...
Token-Ring local area network (LAN) technology was developed and promoted by IBM in the early 1980s and standardised as IEEE 802. ...
IEEE 802. ...
The Internet Protocol (IP) is a data-oriented protocol used for communicating data across a packet-switched internetwork. ...
Asynchronous Transfer Mode (ATM) is a cell relay, packet switching network and data link layer protocol which encodes data traffic into small (53 bytes; 48 bytes of data and 5 bytes of header information) fixed-sized cells. ...
A loopback is a communications channel with only one endpoint. ...
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Security Capturing raw network traffic from an interface requires special privileges on some platforms. For this reason, Wireshark often runs with superuser privileges. Taking into account the huge number of protocol dissectors, which are called when traffic for their protocol is captured, this can pose a serious security risk given a bug in a dissector. Due to the rather large number of vulnerabilities in the past (of which many have allowed remote code execution) and developer's doubts for better future development, OpenBSD removed Ethereal from its ports tree prior to its 3.6 release. On many computer operating systems, superuser, or root, is the term used for the special user account that is controlled by the system administrator. ...
OpenBSD is a Unix-like computer operating system descended from Berkeley Software Distribution (BSD), a Unix derivative developed at the University of California, Berkeley. ...
One possible alternative is to run tcpdump, or the dumpcap utility that comes with Wireshark, with superuser privileges to capture packets into a file, and later analyze these packets by running Wireshark with restricted privileges on the packet capture dump file. tcpdump is a common computer network debugging tool that runs under the command line. ...
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