For network admins and network security professionals, one of the most important tools to learn to use is Wireshark (formerly Ethereal), a free and open source network analyzer/packet sniffer ...

This Wireshark tutorial will familiarize you with Wireshark’s advanced features, such as analyzing packets and undertaking packet level security analysis.

Vendors would have you believe you need to spend thousands of dollars on protocol analyzer software to troubleshoot Voice over IP (VoIP) networks. After all, voice quality suffers if packets are late, ...

Wireshark is a freeware network packet analyzer that captures network packets and displays detailed packet data.

I suggest you just suck it up and run wireshark from the GUI. Also "-i <capture interface> Set the name of the network interface or pipe to use for live packet capture.

The 3rd edition of this book will have you confidently using Wireshark to solve the kind of problems you're likely to run into. You'll be capturing and analyzing packets, understanding network ...

Scott Reeves shares the wireshark filters that helps you isolate TCP and UDP traffic.