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RFC5424 Syslog

This app has been archived. Learn more about app archiving.
This app is NOT supported by Splunk. Please read about what that means for you here.
This is an Add-On for syslog data formatted according to the RFC 5424 or RFC 6587 specifications.


Version 1.1 adds the ability to handle messages formatted according to RFC 6587.


This is an Add-On for syslog data formatted according to the RFC 5424 or RFC 6587 specifications.


Set sourcetype="rfc5424_syslog" for all RFC5424 data inputs. This app includes
index-time transformations for the "host" field, so should be in place BEFORE
data is indexed.


The following fields are extracted:

prival - This integer encodes the syslog facility and severity. Use the convert_facility_severity macro, described below, to decode the facility and severity fields.

appname - The field APP-NAME described in RFC5424

procid - The field PROCID described in RFC5424

msgid - The field MSGID described in RFC5424

host - The field HOSTNAME described in RFC5424. NOTE: This field is an index-time transformation

Within a structured data element (i.e., [...]), the following fields are extracted:

sdid - The field SD-ID described in RFC5424. This field is evaluated as a multi-value field.

key/value pairs - All KV pairs (i.e., field1="value1") are extracted, but are not evaluated as multi-value pairs.


To extract the FACILITY and SEVERITY values from the PRIVAL value:

sourcetype="rfc5424_syslog" | `convert_facility_severity`

To convert FACILITY values into text descriptions:

sourcetype="rfc5424_syslog" | `convert_facility_severity` | lookup facility_lookup facility

To convert SEVERITY values into text descriptions:

sourcetype="rfc5424_syslog" | `convert_facility_severity` | lookup severity_lookup severity


  • Fields which appear more than once in an event (i.e., field1="value1" field1="value2") will not be evaluated as multi-value fields
  • Within a structured data block, the SDID is not associated with the local field names; it is simply another multi-value field, "sdid"
  • The MSG section of the event, if it exists, is not parsed by this app.

Release Notes

Version 1.1
May 19, 2014

Version 1.1 adds the ability to handle messages formatted according to RFC 6587.

Version 1.0
April 30, 2012

Initial release.

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