l8nc 0.1.9

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

PyPI (recommended)

pip install l8nc

Or with pipx for an isolated install:

pipx install l8nc

Homebrew (macOS/Linux)

brew tap cpierce/tap
brew 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 [NO REPLY] 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