Managing network usage without a GUI is crucial for administrators, and this guide reviews ten command‑line Linux tools—such as iftop, vnstat, iptraf, Monitorix, dstat, bwm‑ng, ibmonitor, htop, arpwatch, and Wireshark—that help monitor traffic, diagnose issues, and maintain system performance over SSH.
This tutorial explains the main Wireshark panes, demonstrates how to create and save display and capture filters, outlines common filter expression syntax, and walks through a practical example of capturing and dissecting the three‑way TCP handshake using Wireshark.
Learn how TCP’s three-way handshake and four-way termination work in detail, illustrated with Wireshark packet captures, and understand why each step is necessary through clear explanations and real‑world analogies that demystify network connection establishment and closure.
This article explains why HTTPS is considered secure, how it prevents man‑in‑the‑middle attacks through certificate verification, details the TLS handshake captured with Wireshark, and shows the cryptographic primitives behind RSA, ECDHE and AES, including practical code snippets and the cost of using HTTPS.
This guide introduces Wireshark’s packet capture process, from selecting network interfaces and configuring capture filters to analyzing captured data with display filters, interpreting protocol layers, and performing detailed TCP flow analysis, providing practical examples and filter expressions for effective network troubleshooting and security investigations.
This article shares practical game‑operation case studies using tcpdump and Wireshark, explains the underlying principles, and provides actionable tips for network troubleshooting, Wireshark configuration, tcpdump parameters, filters, and Android capture methods.
When logging into a Linux server via SSH, users may experience a ten‑second pause after entering the username because the server performs a reverse DNS lookup on the client IP, which can be resolved by disabling UseDNS or adding the appropriate PTR record.
This article explains the step‑by‑step process of TLS cipher suite negotiation between browsers and servers, covering browser‑side cipher listing, server‑side configuration, the meaning of cipher names, and how the final suite is selected, with practical Wireshark and PowerShell examples.
This article walks through a real‑time TLS 1.0 handshake captured with Wireshark, explaining client and server hello messages, certificate verification, RSA key exchange, pre‑master and master secret derivation, key block generation, RC4 encryption, and how the encrypted HTTP request and response are finally delivered to the application layer.
