Suricata 3.1.1 released!

We’re proud to announce Suricata 3.1.1. This is a bug fix update for the 3.1 stable release.suri-400x400


  • Feature #1775: Lua: SMTP-support
  • Bug #1419: DNS transaction handling issues
  • Bug #1515: Problem with Threshold.config when using more than one IP
  • Bug #1664: Unreplied DNS queries not logged when flow is aged out
  • Bug #1808: Can’t set thread priority after dropping privileges
  • Bug #1821: Suricata 3.1 fails to start on CentOS6
  • Bug #1839: suricata 3.1 says >=libhtp-0.5.5, but >=libhtp-0.5.20 required
  • Bug #1840: –list-keywords and –list-app-layer-protos not working
  • Bug #1841: libhtp 0.5.21
  • Bug #1844: netmap: IPS mode doesn’t set 2nd iface in promisc mode
  • Bug #1845: Crash on disabling a app-layer protocol when it’s logger is still enabled
  • Optimization #1846: af-packet: improve thread calculation logic
  • Optimization #1847: rules: don’t warn on empty files

Get the release here:

Special thanks

CoverityScan and the Casec Bachelors group: Lauritz Prag Sømme, Levi Tobiassen, Stian Hoel Bergseth, Vinjar Hillestad

Known issues & missing features

If you encounter issues, please let us know! As always, we are doing our best to make you aware of continuing development and items within the engine that are not yet complete or optimal. With this in mind, please notice the list we have included of known items we are working on.  See issues for an up to date list and to report new issues. See Known_issues for a discussion and time line for the major issues.

SuriCon 2.0

dcJoin us in Washington, D.C. November 9-11 for the 2nd Suricata User Conference.

Training & Support

Need help installing, updating, validating and tuning Suricata? We have trainings coming up. September 12-16 in Paris, November 7 & 8 in Washington, D.C.: see

For support options also see

About Suricata

Suricata is a high performance Network Threat Detection, IDS, IPS and Network Security Monitoring engine. Open Source and owned by a community run non-profit foundation, the Open Information Security Foundation (OISF). Suricata is developed by the OISF, its supporting vendors and the community.