rustnet

RustNet is a powerful cross-platform network monitoring tool that brings professional-grade visibility into your network connections directly in the terminal. Whether you're debugging network issues, auditing ports, or troubleshooting traffic, RustNet provides the detailed insights you need without the complexity of traditional packet analyzers.

Key capabilities include:

• Real-time connection tracking for TCP, UDP, ICMP, and ARP protocols with detailed state information including TCP phases, QUIC handshakes, DNS and SSH activity
• Deep packet inspection that identifies HTTP, TLS with SNI, DNS, NTP, DHCP, mDNS, and other application protocols automatically
• Process attribution showing which application owns each connection—something packet analyzers like Wireshark cannot provide
• Interface statistics monitoring bytes, packets, errors, drops, and collisions across all network adapters
• Smart filtering with vim/fzf-style search supporting fields like port:, src:, dst:, sni:, process:, and state: for interactive live filtering
• TCP network analytics detecting retransmissions, out-of-order packets, and fast retransmits with per-connection statistics
• Service name resolution tagging connections with well-known services by port number
• Reverse DNS lookups with background async resolution and intelligent caching
• GeoIP location data showing country codes for remote IPs
• Cross-platform support running on Linux, macOS, Windows, and FreeBSD
• SSH-friendly interface that works over remote connections without X11 forwarding
• Optional logging and Landlock sandboxing on Linux for enhanced security

RustNet fills the gap between simple connection tools like netstat and complex packet analyzers, giving you connection-centric visibility with process context in real-time. Perfect for network engineers, system administrators, and anyone who needs to understand what's happening on their network quickly and efficiently.