On the Packet Capture tab, you can set a packet capture tool to capture packets passing through the device to locate the problems rapidly. Therefore, this tool can be used as an auxiliary tool for troubleshooting.

For example, when you capture a packet passing through the WAN port 80 accessed by the LAN endpoint 192.168.1.10, perform the following steps:

Step 1.Click Create Capture Task, and select Rolling. In the Settings dialog box, select a LAN interface (eth2) for the Interface parameter, set the IP Address parameter to 192.168.1.10, and set the Port parameter to 80, as shown in the following figure.

Step 2.Click Capture. Then, the capture program starts to execute, as shown in the following figure.

Step 3.Make an HTTP request on the endpoint 192.168.1.10. For example, open the webpage http://www.gov.cn.

Step 4.Click Stop and then click Download to download the packet to your PC. See the figure below.

Step 5.Use Sniffer, Ethereal, Wireshark, or other packet capture software to view specific information of a packet file. The analysis result shows that the endpoint accessed the website http://www.gov.cn, as shown in the following figure.