l8nc 0.1.1

Multi-target continuous ping monitor for network troubleshooting

l8nc

Multi-target continuous ping monitor. Pings your gateway, ISP hop, and public DNS simultaneously, showing a live braille chart so you can instantly see where your internet is breaking.

Built for network engineers who need quick answers during calls.

Install

pip install l8nc

Usage

# Auto-detect gateway, ISP hop, and public DNS
l8nc

# Add custom targets to defaults
l8nc 10.0.0.1 example.com

# Only ping specified targets (skip auto-detection)
l8nc --only 10.0.0.1 example.com

# Limit to 10 pings
l8nc -c 10

# Save per-target CSV logs
l8nc -l logs/

# Replay chart from saved logs
l8nc --replay logs/

What it does

l8nc auto-discovers three network hops and pings them in parallel:

1. Gateway — your local router
2. ISP hop — first hop outside your network (via traceroute)
3. Public DNS — Google (8.8.8.8) and Cloudflare (1.1.1.1)

All targets overlay on a single live chart. Timeouts show as [DOWN] rather than 0ms spikes, so the chart stays useful.

Options

Flag	Description
-i, --interval	Ping interval in seconds (default: 1)
-c, --count	Number of pings, then stop (default: infinite)
-o, --only	Only ping specified targets, skip auto-detection
-l, --log	Save per-target CSVs to a directory
-r, --replay	Replay a chart from a log directory
-h, --help	Show help

Requirements

• Python 3.8+
• macOS, Linux, or Windows

License

MIT