This topic describes how to create a packet capture task. You can enable the packet capture feature to capture network data packets for specified IP addresses and ports and analyze the packets. This feature helps you locate faults, analyze attacks, and identify security risks of network communications.
Limits
Enterprise Edition and Ultimate Edition of Cloud Firewall support the packet capture feature. The free trial edition and Premium Edition do not support this feature. Each Alibaba Cloud account has a quota of 200 packet captures per day.
Procedure
- On the Toolbox page, click Capture Now in the Packet Capture section.
- On the Packet Capture page, click Create Packet Capture Task.
- In the Create Packet Capture Task dialog box, configure the required parameters and click OK.
Parameter Description Task Name The name of the packet capture task. We recommend that you enter information such as the task purpose. Maximum Bytes The maximum number of bytes in a packet that can be captured. If the number of bytes in a packet exceeds this number, the packet is discarded. Duration (s) The maximum duration for the packet capture task. Unit: seconds. Protocol The protocol type for packet capture. Valid values: - All
- TCP
- UDP
- ICMP
Address Type The IP address type. - IP: Only packets came from or sent to a specified IP address are captured. You can enter only one IP address.
- IP Address Pair: Only packets that transmitted between specified source and destination IP addresses are captured. You can enter only one source IP address and one destination IP address.
IP The IP address that is specified for packet capture. Ports The port that is specified for packet capture. Peer IP The peer IP address that is specified for packet capture. Note This parameter is required only when Address Type is set to IP Address Pair.Peer Port The peer port that is specified for packet capture. Note This parameter is required only when Address Type is set to IP Address Pair.