[Oisf-devel] Sensor ID in Unified2 Output

Gionet, Jake Gionet.Jake at principal.com
Thu Dec 6 16:35:08 UTC 2012

I'm basing this suggestion off of the link below, which seems to be the most authoritative source of documentation for the Unified2 format that I could find.

Based on section 5.3.8 of the document above, the "Sensor ID" field in Unified2 alerts is completely unused.  It appears that Suricata hardcodes this value to zero from looking at alert-unified2-alert.c (line 361).

Would it be possible to populate this value via the configuration file?  In environments where there are many sensors logging to a central logging device (i.e. enterprise deployment, SIEM logging, etc.) in Unified2 format, this would make it easier to distinguish what sensor an alert came from.

In the event that this field is put into use sometime in the future, the change could be backed out, as I assume it would be a relatively simple change.

Any input on this would be appreciated.

Jake Gionet

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