The Ethereal network protocol analyzer has changed its name to Wireshark.
The name might be new, but the software is the same. Wireshark's powerful features make it the tool of choice for network troubleshooting, protocol development, and education worldwide.
Wireshark was written by networking experts around the world, and is an example of the power of open source
Wireshark is used by network professionals around the world for analysis, troubleshooting, software and protocol development and education.
The program has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product. Its open source license allows talented experts in the networking community to add enhancements.

· Data can be captured "off the wire" from a live network connection, or read from a capture file.
· Wireshark can read capture files from tcpdump (libpcap), NAI's Sniffer (compressed and uncompressed), Sniffer Pro, NetXray, Sun snoop and atmsnoop, Shomiti/Finisar Surveyor, AIX's iptrace, Microsoft's Network Monitor, Novell's LANalyzer, RADCOM's WAN/LAN Analyzer, HP-UX nettl, i4btrace from the ISDN4BSD project, Cisco Secure IDS iplog, the pppd log (pppdump-format), the AG Group's/WildPacket's EtherPeek/TokenPeek/AiroPeek, or Visual Networks' Visual UpTime. It can also read traces made from Lucent/Ascend WAN routers and Toshiba ISDN routers, as well as the text output from VMS's TCPIPtrace utility and the DBS Etherwatch utility for VMS. Any of these files can be compressed with gzip and Ethereal will decompress them on the fly.
· 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 TTY-mode "tethereal" program.
· Capture files can be programmatically edited or converted via command-line switches to the "editcap" program.
· 602 protocols can currently be dissected
· Output can be saved or printed as plain text or PostScript.
· Data display can be refined using a display filter.
· Display filters can also be used to selectively highlight and color packet summary information.
· All or part of each captured network trace can be saved to disk.

Requirements:
· WinPcap 4.x

What's New in This Release:
· Bug Fixes
· The following vulnerabilities have been fixed. See the security advisory for details and a workaround.
· The GSM A RR dissector could crash. (Bug 3893)
· Versions affected: 1.2.0 to 1.2.1
· The OpcUa dissector could use excessive CPU and memory. (Bug 3986)
· Versions affected: 0.99.6 to 1.0.8, 1.2.0 to 1.2.1
· The TLS dissector could crash on some platforms. (Bug 4008)
· Versions affected: 1.2.0 to 1.2.1

The following bugs have been fixed:
· The "Capture->Interfaces" window can't be closed. (Bug 1740)
· tshark-1.0.2 (dumpcap) signal abort core saved. (Bug 2767)
· Memory leak fixes. (Bug 3330)
· Display filter autocompletion doesn't work for some RADIUS and WiMAX ASNCP fields. (Bug 3538)
· Wireshark Portable includes wrong WinPcap installer. (Bug 3547)
· Crash when loading a profile. (Bug 3640)
· The proto,colinfo tap doesn't work if the INFO column isn't being printed. (Bug 3675)
· Flow Graph adds too much unnecessary garbage. (Bug 3693)
· ...