Bandwhich

bandwhich is a command-line network utility and terminal bandwidth monitor designed for real-time traffic analysis. It functions as a process-based traffic tracker that links network bandwidth usage directly to the system processes and remote hosts responsible for the data transfer.

The tool provides a terminal user interface for monitoring active connections and identifying data-consuming applications. It performs background reverse DNS lookups to associate remote IP addresses with human-readable hostnames and tracks cumulative data utilization over the duration of a capture session.

Its broader capabilities include network traffic filtering to isolate specific connections and the export of raw bandwidth metrics into machine-readable, delimited formats for external analysis.

Features

Network Traffic Analyzers - Provides a terminal-based network traffic analyzer that monitors active connections and identifies consuming applications.

Process-to-Socket Mappings - Correlates network sockets with system process IDs using the proc filesystem for traffic attribution.

Packet Capture Engines - Implements a packet-capture engine that reads raw network traffic directly from the kernel.

Bandwidth Monitors - Implements a real-time terminal bandwidth monitor that tracks utilization per application and remote host.

Network Traffic Analysis - Filters and isolates network data to identify the applications or remote IP addresses consuming the most bandwidth.

Process Activity Trackers - Tracks network bandwidth usage by attributing it directly to the responsible system processes.

Real-Time Network Monitors - Tracks real-time network utilization and attributes traffic to specific processes and remote hostnames.

Cumulative - Calculates the total cumulative data transferred over the duration of a capture session.

DNS Tools - Captures and displays DNS queries using the system default or a specified DNS server.

Bandwidth Auditing - Collects raw bandwidth metrics and cumulative data transfer totals for historical analysis.

DNS Query Monitoring - Captures DNS queries and performs reverse lookups to associate remote IP addresses with hostnames.

Network Utilities - Functions as a lightweight command-line utility for monitoring data transfer rates.

Reverse DNS Resolution - Performs background reverse DNS lookups to resolve remote IP addresses into human-readable hostnames.

Traffic Filtering - Allows restricting displayed traffic to specific processes, connections, or IP addresses to isolate data.

Metric Redraw Cycles - Updates a terminal user interface by periodically refreshing a buffer of sorted network utilization metrics.

Networking and Internet - Network utilization monitor categorized by process.

System Dashboards - Visualize terminal bandwidth utilization.

System Utilities - Terminal bandwidth utilization tool.

Internet Speedtest - Track bandwidth utilization by process.

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Features

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