[Suricata 1.4.2] Next Generation Intrusion Detection and Prevention Engine

The Suricata Engine is an Open Source Next Generation Intrusion Detection and Prevention Engine. This engine is not intended to just replace or emulate the existing tools in the industry, but will bring new ideas and technologies to the field.

OISF is part of and funded by the Department of Homeland Security's Directorate for Science and Technology HOST program (Homeland Open Security Technology), by the the Navy's Space and Naval Warfare Systems Command (SPAWAR), as well as through the very generous support of the members of the OISF Consortium. More information about the Consortium is available, as well as a list of our current Consortium Members

 The Suricata Engine and the HTP Library are available to use under the GPLv2

The HTP Library is an HTTP normalizer and parser written by Ivan Ristic of Mod Security fame for the OISF. This integrates and provides very advanced processing of HTTP streams for Suricata. The HTP library is required by the engine, but may also be used independently in a range of applications and tools. 


  • No longer force "nocase" to be used on http_host
  • Invalidate rule if uppercase content is used for http_host w/o nocase
  • Warn user if bpf is used in af-packet IPS mode
  • Better test for available libjansson version


  • Fixed accuracy issues with relative pcre matching (#784)
  • Improved accuracy of file_data keyword (#788)
  • Invalidate negative depth (#770)
  • Fix http host parsing for IPv6 addresses (#761)
  • Fix fast.log formatting issues (#773)
  • Fixed deadlock in flowvar set code for http buffers (#801)
  • Various signature ordering improvements
  • Minor stream engine fix

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