Wireshark
Capturing and inspecting network traffic packets to diagnose protocols and security issues
Wireshark is an open-source network protocol analyser that captures live network traffic and decodes it into a human-readable display of individual packets, showing headers, payloads, and protocol-level details. Network engineers use it to diagnose slow connections, identify misconfigured protocols, and trace exactly how traffic flows between hosts. Security analysts use it to identify suspicious patterns, inspect unencrypted communications, and reconstruct sessions during incident investigations. Wireshark supports hundreds of protocols and can read capture files from other tools. It is the standard tool for anyone doing hands-on network troubleshooting or learning how protocols such as TCP/IP, DNS, HTTP, and TLS function in practice.
Official Website
Wireshark official site →Pricing
View pricing →Wireshark Use Cases
- Capturing live traffic on a network interface to observe the exact packets exchanged between hosts during a connection or transaction
- Diagnosing intermittent network performance issues by filtering packet captures to isolate retransmissions, timeouts, and latency outliers
- Inspecting protocol behaviour at the packet level to verify that applications implement TCP, DNS, TLS, and HTTP correctly
- Analysing packet captures from security incidents to reconstruct session timelines and identify the method and scope of an intrusion
- Learning how network protocols function by watching real traffic and correlating packet-level events with application behaviour
Wireshark Learning Resources
The official Wireshark User's Guide at wireshark.org/docs provides the authoritative reference for capture filters, display filters, and protocol dissectors. Chris Greer's free Wireshark tutorial series on YouTube covers practical packet analysis from first captures through troubleshooting real network issues.