Wireshark — Network Traffic Analysis

How to capture and read network packets, and what to actually look for as a beginner instead of getting lost in the noise.

What it does

Wireshark captures every packet moving across a network interface and lets you inspect protocols layer by layer — used for troubleshooting, forensics, and understanding exactly how attacks or protocols behave at the packet level.

First things to try

• Capture traffic on your own machine while browsing a non-HTTPS test site to see plaintext HTTP
• Use display filters like http, dns, or tcp.port==443 to cut through noise
• Follow a "TCP Stream" on one connection to see the full conversation reconstructed

Where this connects to security

• Spotting plaintext credentials sent over unencrypted protocols
• Understanding DNS requests during malware/OSINT analysis
• Reading pcap files provided in CTF forensics challenges