Network bandwidth testing with iperf and iperf3. Understand differences and common usage patterns. iperf vs iperf3 Key Differences Feature iperf2 iperf3 Compatibility Not compatible with iperf3 Not compatible with iperf2 Parallel Streams Multiple streams in both directions One direction at a time Simultaneous …

Packet capture and analysis with tcpdump. Essential tool for network debugging and security analysis. Installation 1# Linux 2sudo apt install tcpdump 3 4# macOS (pre-installed) 5# Or update with brew 6brew install tcpdump 7 8# Verify 9tcpdump --version Basic Commands 1# Capture on default interface 2sudo tcpdump 3 4# …

WireGuard VPN setup with port forwarding and tunneling. Modern, fast, and secure VPN solution. Installation 1# Linux (Ubuntu/Debian) 2sudo apt update 3sudo apt install wireguard 4 5# Linux (Fedora/RHEL) 6sudo dnf install wireguard-tools 7 8# macOS 9brew install wireguard-tools 10 11# Windows 12# Download from …