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Use tcpdump to view Packet Flows (Doc ID 2259297.1)

Last updated on MARCH 11, 2022

Applies to:

Corente Cloud Services Exchange - Version 9.2 and later
Linux OS - Version Oracle Linux 5.0 and later
Oracle Cloud Infrastructure - Version N/A and later
Information in this document applies to any platform.


This could be taken as a tcpdump tutorial and primer with examples. Analyzing tcpdump in much greater detail is beyond the scope of this section.

tcpdump is a most powerful and widely used command-line packets sniffer or package analyzer tool which is used to capture or filter TCP/IP packets that received or transferred over a network on a specific interface. It is available under most of the Linux/Unix based operating systems. tcpdump also gives us a option to save captured packets in a file for future analysis. It saves the file in a pcap format, that can be viewed by tcpdump command or a open source GUI based tool called Wireshark (Network Protocol Analyzier) that reads tcpdump pcap format files.

One of the most common uses of tcpdump is to determine whether you are getting basic two-way communication. Lack of communication could be due to the following:


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