RSyslog Documentation

MaxMind/GeoIP DB lookup (mmdblookup)

Module Name:mmdblookup


MaxMindDB is the new file format for storing information about IP addresses in a highly optimized, flexible database format. GeoIP2 Databases are available in the MaxMind DB format.

Plugin author claimed a MaxMindDB vs GeoIP speed around 4 to 6 times.

How to build the module

To compile Rsyslog with mmdblookup you’ll need to:

  • install libmaxminddb-devel package
  • set –enable-mmdblookup on configure

Configuration Parameter


Parameter names are case-insensitive.

Module Parameters


typedefaultmandatoryobsolete legacy directive

New in version 8.28.0.

Specifies the container to be used to store the fields amended by mmdblookup.

Input Parameters


typedefaultmandatoryobsolete legacy directive

Name of field containing IP address.


typedefaultmandatoryobsolete legacy directive

Location of Maxmind DB file.


typedefaultmandatoryobsolete legacy directive

Fields that will be appended to processed message. The fields will always be appended in the container used by mmdblookup (which may be overridden by the “container” parameter on module load).

By default, the maxmindb field name is used for variables. This can be overridden by specifying a custom name between colons at the beginning of the field name. As usual, bang signs denote path levels. So for example, if you want to extract “!city!names!en” but rename it to “cityname”, you can use “:cityname:!city!names!en” as field name.


Minimum configuration

This example shows the minimum configuration.

# load module
module( load="mmdblookup" )

action( type="mmdblookup" mmdbfile="/etc/rsyslog.d/GeoLite2-City.mmdb"
             fields=["!continent!code","!location"] key="!clientip" )

Custom container and field name

The following example uses a custom container and custom field name

# load module
module( load="mmdblookup" container="!geo_ip")

action( type="mmdblookup" mmdbfile="/etc/rsyslog.d/GeoLite2-City.mmdb"
             fields=[":continent:!continent!code", ":loc:!location"]

See also

Help with configuring/using Rsyslog:

  • Mailing list - best route for general questions
  • GitHub: rsyslog source project - detailed questions, reporting issues that are believed to be bugs with Rsyslog
  • Stack Exchange (View, Ask) - experimental support from rsyslog community

See also

Contributing to Rsyslog:

Copyright 2008-2020 Rainer Gerhards (Großrinderfeld), and Others.

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