How to capture incoming and utgoing NTP traffic using the Packet Monitor

03/26/2020 18 13613

DESCRIPTION:
How to capture incoming and utgoing NTP traffic using the Packet Monitor

RESOLUTION:

In order to capture incoming or outgoing NTP traffic on the SonicWall appliance, we need to go to the Packet Monitor :

1/ Click System
2/ Click Packet Monitor
3/ Click Configure

A new pop up window will appear, containing the Packet Monitor options

In that new window, we will configure the Packet Monitor so that it captures incoming and outgoing NTP traffic:

1/ Click on the "Monitor Filter" tab
2/ Fill in the fields as shown in the screenshot above :

- Ether Type(s) : IP
- IP Type(s): UDP
- Destination Port(s): 123

3/ Make sure the box that says "Enable Bidirectional address and Port matching" is checked.

1/ Go to the "Display Filter" tab
2/ Fill in the fields as shown in the screenshot above :

- Ether Type(s) : IP
- IP Type(s): UDP
- Destination Port(s): 123

3/ Make sure all boxes on this tab are checked.


1/ Go to the "Advanced Monitor Filter" tab
2/ Male sure all boxes on that tab are checked
3/ Click the "OK" button to confirm the settings and close that pop-up window.


1/ We can now start the capture by clicking the "Start Capture" button
2/ The "Trace Active" icon will become green indicating the capture is taking place
3/ NTP traffic that has been capture will show in the "Captured Packets" fields (Use the "Refresh" button regularly to update the content of the captured packets)
4/ Click "Stop Capture" whenever you feel you have capture enough data.
5/ Export your capture in your preferred format (Libpcap,HTML, TEXT or appdata)