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prometheus-nmap-exporter's Introduction

prometheus-nmap-exporter

This code is a kind of PoC regarding dead-simple external firewall monitoring. For functional monitoring of TCP listeners, look at prometheus/blackbox_exporter

This also served as Golang learning experience.

So what happens here?

This code will:

  1. read targets from config.json file (see config.json.example)
  2. Run simple nmap scan against these targets
  3. Compare the scan results with input configuration and display appropriate metrics

Metrics

Metric name Description Values
service_monitor_port_expected Describes if discovered port was on the expected list 0 for unexpected host/port combination, 1 for expected
service_monitor_port_missing Describes if a port that was not the expected list was not found 0 for present port, 1 for missing port

Metrics Labels

Two labels are attached to each metric:

  • host - with the name of scanned host
  • port - which port is that particular metric value about

TODO

  • displayed metrics need descriptions, type definitions etc (could use own struct)
  • make configurable: WithSYNScan() / WithConnectScan() (SYN scan tends to be very slow in docker)
  • UDP scans?
  • comments + docs
  • tests
  • automated build / pipeline using public CI systems
  • docker hub(?)

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