Wireshark is a network packet analyzer. A network packet analyzer will try to capture network packets and tries to display that packet data as detailed as possible. You could think of a network packet analyzer as a measuring device used to examine what's going on inside a network cable, just like a voltmeter is used by an electrician to examine what's going on inside an electric cable (but at a higher level, of course). In the past, such tools were either very expensive, proprietary, or both. However, with the advent of Wireshark, all that has changed. Wireshark is perhaps one of the best open source packet analyzers available today.
- 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
- 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 platfrom)
- 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
Wireshark 3.4.5 bug fixes:
- TShark does not print GeoIP information Issue 14691.
- TShark error when piping to "head" Issue 16192.
- Parts of ASCII representation in Packet Bytes pane are missing Issue 17087.
- Buildbot crash output: fuzz-2021-02-22-1012761.pcap Issue 17254.
- NDPE attribute of NAN packet is not dissected Issue 17278.
- TECMP: reserved flag interpreted as part of timestamp Issue 17279.
- Master branch does not compile at least with gcc-11 Issue 17281.
- DNS IXFR/AXFR multiple response Issue 17293.
- File too large Issue 17301.
- Build fails with CMake 3.20 Issue 17314.
The following vulnerabilities have been fixed:
wnpa-sec-2021-04 MS-WSP dissector excessive memory consumption. Issue 17331.
Updated Protocol Support
DECT, DNS, EAP, Kerberos, LDAP, MS-WSP, SMB2, Sysdig, TECMP, and WiFi NAN
New and Updated Capture File Support