Query collected network flow data via the ntopng REST API
domain: ntop.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Authenticate with HTTP Basic auth using your ntopng web UI admin credentials, and use HTTPS in production since there's no separate API-key mechanism.
Call community/free-tier endpoints under /lua/rest/v2/..., e.g. GET /lua/rest/v2/get/host/data.lua?ifid=<interface_id>&host=<ip> for basic per-host data.
Parse every response inside the {"rc": <code>, "rc_str": "<status>", "rsp": {...}} envelope, checking rc for success/failure.
For per-flow record queries, note these live under the Pro-licensed path /lua/pro/rest/v2/get/db/flows.lua (with select_clause/where_clause/begin_time_clause/end_time_clause params) rather than the free community API surface.
Do not use ElastiFlow for a query-flow-data-via-API integration — it's a self-hosted collector configured through YAML/env vars whose bundled API is scoped to Prometheus-style metrics and admin/health checks, not flow-record queries; flow data ends up in whatever downstream store (e.g. Elasticsearch) you configured it to write to.
Known gotchas
Most of what an ISP actually wants — per-flow queries, SNMP device stats, alert timeseries — lives under /lua/pro/rest/v2/ and requires a paid Pro license; unlicensed calls return a -3 NOT_GRANTED code rather than a 403, which is easy to misdiagnose as an auth bug.
There's no separate API-key mechanism — auth is your admin web UI credentials sent over Basic auth, so HTTPS is effectively mandatory to avoid exposing them.
The Sphinx-generated API docs have occasional path/description mismatches — cross-check against the docs' Examples page rather than trusting every listed path at face value.
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