Nmap codec plugin

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  • Plugin version: v0.0.21
  • Released on: 2017-11-07
  • Changelog

For other versions, see the Versioned plugin docs.

Installation

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For plugins not bundled by default, it is easy to install by running bin/logstash-plugin install logstash-codec-nmap. See Working with plugins for more details.

Getting Help

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For questions about the plugin, open a topic in the Discuss forums. For bugs or feature requests, open an issue in Github. For the list of Elastic supported plugins, please consult the Elastic Support Matrix.

Description

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This codec is used to parse namp output data which is serialized in XML format. Nmap ("Network Mapper") is a free and open source utility for network discovery and security auditing. For more information on nmap, see https://nmap.org/.

This codec can only be used for decoding data.

Event types are listed below

nmap_scan_metadata: An object containing top level information about the scan, including how many hosts were up, and how many were down. Useful for the case where you need to check if a DNS based hostname does not resolve, where both those numbers will be zero. nmap_host: One event is created per host. The full data covering an individual host, including open ports and traceroute information as a nested structure. nmap_port: One event is created per host/port. This duplicates data already in nmap_host: This was put in for the case where you want to model ports as separate documents in Elasticsearch (which Kibana prefers). nmap_traceroute_link: One of these is output per traceroute connection, with a from and a to object describing each hop. Note that traceroute hop data is not always correct due to the fact that each tracing ICMP packet may take a different route. Also very useful for Kibana visualizations.

Nmap Codec Configuration Options

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emit_hosts

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  • Value type is boolean
  • Default value is true

Emit all host data as a nested document (including ports + traceroutes) with the type nmap_fullscan

emit_ports

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  • Value type is boolean
  • Default value is true

Emit each port as a separate document with type nmap_port

emit_scan_metadata

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  • Value type is boolean
  • Default value is true

Emit scan metadata

emit_traceroute_links

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  • Value type is boolean
  • Default value is true

Emit each hop_tuple of the traceroute with type nmap_traceroute_link