Netstatis a command-line tool at least available in Linux and Windows that displays network statistics on most operating systems. These activities will show you how to use the netstat command.

Examples:

• Linux: netstat -vatunp. See also: ss -t -a (included in iproute2 package)
• MacOS: netstat -ap tcp | grep LISTEN

Readings

• Wikipedia: netstat

Lessons

• Internet Protocol Analysis - Transport Layer

Activities

• Display Active TCP Connections:netstat
• Display All Active Connections (TCP and UDP)
• Display Statistics by Protocol: netstat -s

See also

• ifconfig and netcat commands
• Ansible listen_ports_facts module

References

• Microsoft TechNet: Netstat