Bean Network Tester

Features

• Add lag and jitter - fixed or random delay, plus occasional spikes.
• Drop, corrupt or duplicate packets - loss can arrive in bursts, the way a real wireless link fails.
• Cap download/upload speed - throttle to a set KB/s, with a buffer that adds queuing delay before it starts dropping.
• Tear connections down - TCP resets, a dead link, or new connections that never come up.
• Flap the link on and off - outages that come and go.
• Block ports or IPs - a small built-in firewall, plus LAN mode (no internet) and internet only (no local network).
• Aim at one app - by process name, PID, IP, port, or one address family.
• Presets and saved profiles - 56k modem, Cafe WiFi, Satellite, In-flight Wi-Fi and more.
• Run scripted scenarios - timed steps that change the network on their own.
• Reproducible by seed - replay the exact same random loss and jitter.
• Watch it live - chart, counters, a searchable connections table and an event log.
• Command-line mode - scriptable for CI, with exit codes and JSON output.
• No telemetry, fully offline - sends no data anywhere.
• Break the path, not only the packets - an MTU black hole and NAT-style idle timeouts.
• Export to CSV - session statistics and a snapshot of the connections table.

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