Tcpdump

tcpdump is a command line tool used for analysing network traffic passing through your system. It can be used to capture and filter packets and display them in a human-readable format. The captured information can be analysed at a later date as well.

Visit the following resources to learn more:

• tcpdump Documentation
• Basic Introduction to Tcpdump
• 50 ways to isolate traffic with Tcpdump
• Interpreting Tcpdump output and data