| Filename | Wireshark - Packet Analyzer |
| Permission | rw-r--r-- |
| Author | WhySoSeriousssssssssssss |
| Date and Time | 07:55 |
| Label | hack |
| Action |
Wireshark is cross-platform, using the GTK+ widget toolkit to implement its user interface, and using pcap to capture packets. It runs on various Unix-like operating systems including Linux, Mac OS X, BSD, and Solaris, and on Microsoft Windows. There is also a terminal-based (non-GUI) version called TShark. Wireshark, and the other programs distributed with it such as TShark, are free software, released under the terms of the GNU General Public License.
Download Wireshark for Windows 32-bit here and Windows 64-bit here
Features
Wireshark is software that "understands" the structure of different networking protocols. It is able to display the encapsulation and the fields along with their meanings of different packets specified by different networking protocols. Wireshark uses pcap to capture packets, so it can only capture the packets on the types of networks that pcap supports.
- Data can be captured "from the wire" from a live network connection or read from a file that recorded already-captured packets.
- Live data can be read from a number of types of network, including Ethernet, IEEE 802.11, PPP, and loopback.
- 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.
- Data display can be refined using a display filter.
- Plug-ins can be created for dissecting new protocols.
- VoIP calls in the captured traffic can be detected. If encoded in a compatible encoding, the media flow can even be played.
- Raw USB traffic can be captured with Wireshark. This feature is currently available only under Linux.
Wireshark's native network trace file format is the libpcap format supported by libpcap and WinPcap, so it can read capture files from applications such as tcpdump and CA NetMaster that use that format, and its captures can be read by applications that use libpcap or WinPcap to read capture files. It can also read captures from other network analyzers, such as snoop, Network General's Sniffer, and Microsoft Network Monitor.
Package install
There is no Wireshark package for the Ubuntu releases before edgy (6.10) and no Wireshark stable package for Debian too. In these cases you need to download an Ethereal package or to compile Wireshark from source.
Ubuntu releases before Edgy (6.10) - #apt-get install ethereal
Ubuntu releases starting from Edgy (6.10) - #apt-get install wireshark
To launch Wireshark under Ubuntu - #wireshark
Wireshark GUI - Capture Filters
The capture filter syntax is the same as the one used by programs using the Lipcap (Linux) or Winpcap (Windows) library like the famous TCPdump. The capture filter must be set before launching the Wiershark capture, which is not the case for the display filters that can be modified at any time during the capture. The steps to configure a capture filter are the following:
- select capture - options
- Fill the "capture filter" field or click on the "capture filter" button to give a name to your filter to reuse it for subsequent captures.
- Click on Start to capture data.
The result will show you the source and destination IP address, protocol and info.
Wireshark GUI - Capture Data Packets
- From the Wireshark menubar choose Capture - Interfaces. Next choose the interface (network interface card or NIC). Or choose Capture - Options and choose the interface.
IMPORTANT: Turn promiscuous mode off if you don't want a network administrator see you running in that mode.
- Create a capture filter to prevent Wireshark from capturing all network traffic going through the interface. In the text field next to the "Capture Filter" button, type host [ip_address] substituting in the IP address you care about for the [ip_address] part. This will create a filter that passes only that traffic either originating from or going to the specified host.
- You can also choose the option Capture - Capture Filters. Choose the specific filter and click OK.
- Now you can press Start. Wireshark is now capturing any data involving the specified IP address, whether as a source or as a destination. Or capturing all data involving the specified interface.
- With the option Go you can choose to view a specific packet. Just type the number of the packet in the text field and choose Jump to. You can also double click on a specific packet to view the data. An other window will pop-up with the data information of the specific packet.
- For example, go to Analyze - Follow TCP Stream. You should see the TCP stream content.
yntax examples
tcp dst port 3128 - Displays packets with destination TCP port 3128.
ip src host 10.1.1.1 - Displays packets with source IP address equals to 10.1.1.1.
host 10.1.2.3 - Displays packets with source or destination IP address equals to 10.1.1.1.
src portrange 2000-2500 - Displays packets with source UDP or TCP ports in the 2000-2500 range.
not imcp - Displays everything except icmp packets (icmp is typically used by the Ping tool).
src host 10.7.2.12 and not dst net 10.200.0.0/16 - Displays packets with source IP address equals to 10.7.2.12 and in the same time not with the destination IP network 10.200.0.0/16.
Menu
The eight menus at the top of the platform are used to configure Wireshark
File - Opens or save a capture
Edit - Finds or mark packets
View - Configures the Wireshark platform view
Go - Reach data inside the capture
Capture - Sets capture filters options and starts the capture
Analyze - Sets Analyze options
Statistics - Views Wireshark statistics
Help - Finds local or online support
Display Filter
The display filter is used to search inside captured data obtained with a capture filter. Its search capabilities are more extended than those of the capture filter and it is not necessary to restart the capture when you need to change your filter.
Syntax Examples
snmp || dns || icmp - Display the SNMP or DNS or ICMP traffics.
ip.addr == 10.1.1.1 - Displays the packets with source or destination IP address equals to 10.1.1.1.1.
tcp.port == 25 - Display packets with TCP source or destination port 25.
tcp.dstport == 25 - Display packets with TCP destination port 25.
Packet List Pane
The packet list pane displays all the captured packets. You can get information such as the source or destination MAC/IP addresses, the TCP/UDP ports number, the protocol or the packet content. If an OSI layer 2 packet is captured you will see MAC addresses in the source and destination columns and, of course, nothing in the port column. If an OSI layer 3 or upper packet is captured you will see IP addresses in the source and destination columns. The port column is populated only if the packet is at the layer 4 or upper.
You can add/remove columns or change some colors in the pane as follows Edit menu - Preferences
Packet Details Pane
The packet details pane gives in depth information about a packet selected in the packet list pane. The information is displayed per OSI layer and can be expanded and collapsed.
Dissector Pane
The dissector panel also called "packet bytes pane" by Wireshark, displays the same information as those provided on the packet details pane but in the hexadecimal style.
Miscellanous
At the bottom of the platform you can find the following information:
- The network card used for the capture.
- If the capture is running or stopped.
- Where the capture is stored on the hard drive.
- the capture size.
- the number of captured packets. (P)
- the number of displayed packets. (D) (Packets matching the display filter)
- the number of marked packets. (M)
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