sniffnet

Sniffnet is an open-source, cross-platform desktop application for monitoring network traffic. According to its README, it aims to be intuitive and reliable, and is translated into many languages. Key capabilities described: - Choose a network adapter of your PC to inspect. - Select filters to apply to observed traffic. - Import and export capture reports as PCAP files. - View overall statistics and real-time charts about traffic intensity. - Identify connections in your local network and discover the geographical location of remote hosts. - Find out domain name and ASN of hosts you exchange traffic with. - Identify 6000+ upper layer services, protocols, trojans and worms. - See which programs are generating network bandwidth. - Save favorite network hosts, services and programs. - Keep monitoring while the application is minimized. - Search and inspect each network connection in real time. - Set custom notifications for defined network events. - Import custom IP blacklists to highlight potentially dangerous connections. - Choose visual styles, including custom themes. Distribution: prebuilt installers are offered for Windows (x64, arm64, x86), macOS (Intel and Apple silicon) and Linux (DEB, RPM, AppImage for several architectures), downloadable from GitHub releases. The README notes that required dependencies must also be installed, and points to a Wiki for a full user manual, alternative installation methods and troubleshooting. A rendering fallback is documented via the ICED_BACKEND=tiny-skia environment variable. The project is free and open source, accepts sponsorship, and credits contributors, the iced GUI library, MaxMind for IP geolocation and ASN data, and SignPath for Windows code signing.