Features

• Deep inspection of hundreds of protocols, with more being added all the time
• Live capture and offline analysis
• Standard three-pane packet browser
• Multi-platform: Runs on Windows, Linux, OS X, Solaris, FreeBSD, NetBSD, and many others
• Captured network data can be browsed via a GUI, or via the TTY-mode TShark utility
• The most powerful display filters in the industry
• Rich VoIP analysis
• Read/write many different capture file formats: tcpdump (libpcap), Pcap NG, Catapult DCT2000, Cisco Secure IDS iplog, Microsoft Network Monitor, Network General Sniffer® (compressed and uncompressed), Sniffer® Pro, and NetXray®, Network Instruments Observer, NetScreen snoop, Novell LANalyzer, RADCOM WAN/LAN Analyzer, Shomiti/Finisar Surveyor, Tektronix K12xx, Visual Networks Visual UpTime, WildPackets EtherPeek/TokenPeek/AiroPeek, and many others
• Capture files compressed with gzip can be decompressed on the fly
• Live data can be read from Ethernet, IEEE 802.11, PPP/HDLC, ATM, Bluetooth, USB, Token Ring, Frame Relay, FDDI, and others (depending on your platform)
• Decryption support for many protocols, including IPsec, ISAKMP, Kerberos, SNMPv3, SSL/TLS, WEP, and WPA/WPA2
• Coloring rules can be applied to the packet list for quick, intuitive analysis
• Output can be exported to XML, PostScript®, CSV, or plain text 

• Qt port:
  • The About dialog has been added
  • The Capture Interfaces dialog has been added.
  • The Decode As dialog has been added. It managed to swallow up the User Specified Decodes dialog as well.
  • The Export PDU dialog has been added.
  • Several SCTP dialogs have been added.
  • The statistics tree (the backend for many Statistics and Telephony menu items) dialog has been added.
  • The I/O Graph dialog has been added.
  • French translation has updated.

• Mac OS X packaging has been improved.

• Dissector output may be encoded as UTF-8. This includes TShark output.
• Qt port:
  • The Follow Stream dialog now supports packet and TCP stream selection.
  • A Flow Graph (sequence diagram) dialog has been added.
  • The main window now respects geometry preferences.

• Wireshark now uses the Qt application framework. The new UI should provide a significantly better user experience, particularly on Mac OS X and Windows.
• The Windows installer now uninstalls the previous version of Wireshark silently. You can still run the uninstaller manually beforehand if you wish to run it interactively.
• Expert information is now filterable when the new API is in use.
• The “Number” column shows related packets and protocol conversation spans (Qt only).
• When manipulating packets with editcap using the -C and/or -s options, it is now possible to also adjust the original frame length using the -L option.
• You can now pass the -C option to editcap multiple times, which allows you to chop bytes from the beginning of a packet as well as at the end of a packet in a single step.
• You can now specify an optional offset to the -C option for editcap, which allows you to start chopping from that offset instead of from the absolute packet beginning or end.
• “malformed” display filter has been renamed to “_ws.malformed”. A handful of other filters have been given the “_ws.” prefix to note they are Wireshark application specific filters and not dissector filters.