If your ExtraHop system is configured for continuous packet capture, you can search for and download packets from the Packets page in the ExtraHop system and the Packet Search resource in the ExtraHop REST API. The downloaded packets can then be analyzed through a third-party tool, such as Wireshark.
Launch a quick packet query by clicking Packets from the top menu. The ExtraHop system queries for all packets and displays the Packet Query page. If you change the time interval, the query starts again. Either end of the gray bar displays a timestamp, which is determined by the current time interval. The time on the right displays the starting point of the query and the time on the left displays the endpoint of the query. The blue bar indicates the time range during which the system found packets. You can drag to zoom on a period of time in the blue bar to run a query again for that selected time interval.
The following figure provides an overview of the Packet Query page and features:
|Tip:||Filter packets with Berkeley Packet Filter syntax.|
There are multiple locations in the ExtraHop system from which you can initiate a packet query:
- Type an IP address in the global search field and then select the Search Packets
- Click Packets from the upper right corner of a device
- Click the Packets icon next to any record on a record query results page.
- Click on an IP address or hostname in any chart with metrics for network bytes
or packets by IP address to see a context menu. Then, select the Packets icon
to query for the device and time interval.