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ShardFlow
Layer-2 LAN workbench: ARP, drop, throttle, pcap any device.
About
Layer-2 LAN workbench for authorized lab use. Discovers every device on the wire (ARP, mDNS, SSDP, OUI) and applies per-target drop, throttle, or silent pcap policies via nftables, tc/IFB, and AF_PACKET ARP poisoning. TUI + JSON-RPC CLI.
Features
Device discovery via ARP sweep, mDNS, SSDP, OUI vendor lookup
Drop, throttle (tc HTB + IFB), and silent pcap to .pcapng
Tunable ARP cadence down to 50ms for hardened mobile devices
Lab sandbox: spin up 16 fake netns hosts for safe testing
JSON-RPC CLI for scripting automated network policies
TUI dashboard with live traffic metrics per target
Tech Stack
Go Linux nftables libpcap AF_PACKET JSON-RPC
Policy Modes
Drop
Complete network isolation via nftables rules — target loses all connectivity
Throttle
Bandwidth shaping via tc HTB + IFB — configurable rate limits per target
Pcap
Silent packet capture to .pcapng — passive monitoring with zero target disruption