MaxMind/GeoIP DB lookup (mmdblookup)

Module Name: mmdblookup
Author: chenryn
Available: 8.24+


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.

Module parameters

Note: parameter names are case-insensitive.

  • container - default “!iplocation” v8.28.0+

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

Input parameters

Note: parameter names are case-insensitive.

  • key - default none

    Name of field containing IP address.

  • mmdbfile - default none

    Location of Maxmind DB file.

  • fields - default none

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

    By default, the maxmindb field name is used for variables. This can be overriden by specifying a custom name between colons at the beginnig 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.


# load module
module( load="mmdblookup" )

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

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"]


To compile Rsyslog with mmdblookup you’ll need to:

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