![]() For example, if you have a sensor named “wlanpi” and the interface name is “wlan0”, the capture source name saved with the packet would be “wlanpi:wlan0.” This file format allows applications to include metadata information in the file that describes different capture properties, such as the name of the interface used to capture each packet.Īirtool 2 uses this feature to append a friendly name of the capture source to each packet that it saves in the capture file. Working with multi-source capturesĪirtool 2 uses the PCAP Next Generation (pcapng) capture file format. ![]() You can also use advanced features, such as file rotation, automatic packet slicing, or automatically upload the captures to CloudShark or Arista Packets. Remote sensors must synchronize their clocks using NTP (if you’re using a WLAN Pi, it’s already configured to synchronize its clock) for the merge operation to work correctly.Īs with any other capture, you can choose to have Airtool 2 save multi-source captures to a file or launch Wireshark and pass the packets to it so that you can see the capture live. As Airtool 2 receives packets from each “source,” it merges them on the fly based on their timestamp to generate a single capture file. When you click “Start Capture,” Airtool 2 connects to each sensor, sets each sensor’s interface in monitor mode, configures the channel and channel width, and starts a packet capture on all capture sources simultaneously. In general, a limit of 500 bytes should allow you to capture complete beacon and probe response frames while truncating larger data packets.Īnd that’s all. Optionally, you can also limit the frame size to a maximum number of bytes (especially if you’re not interested in user data payloads) to reduce the amount of data transferred back to Airtool 2. Invalid multi-source capture configuration. Channel hopping works fine for specific scenarios, but you cannot use it if you need to capture data from all channels simultaneously. However, because a Wi-Fi adapter can’t tune in to various channels simultaneously, Airtool 2 works around it by doing channel hopping: Airtool 2 captures packets on a channel for a given amount of time, then it hops to the next channel, and so on. There’s already an option in Airtool 2 to capture packets on multiple channels using the built-in Wi-Fi adapter. A multi-channel capture consists of doing a packet capture on two or more channels simultaneously. Wi-Fi networks transmit packets using different radio frequencies, also called channels. To learn more about setting up and using remote sensors, see: Capture using a remote sensor. The WLAN Pi comes pre-configured with everything you need to be used as a sensor with Airtool 2 and WiFi Explorer Pro 3. You can build a remote sensor or use a WLAN Pi. This custom script performs the packet capture using a compatible Wi-Fi adapter and sends the packets back to Airtool 2. ![]() A remote sensor is just a Linux box configured to allow Airtool 2 to execute a script via SSH. Īirtool 2 also allows you to do Wi-Fi packet captures using a remote sensor. It integrates with Wireshark very nicely and lets you upload captures to cloud services such as CloudShark and Packets. Airtool 2 is a packet capture utility that allows you to capture Wi-Fi traffic using your Mac’s built-in Wi-Fi adapter.
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