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I am trying to setup the geoip filter for logstashin Debian Stretch, as per this question

I installed the geoip-database package, however logstash logs complain of wrong database format. What to do?

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It turns out the databases that come with the geoip-database package and that are downloaded by geoip-database-contrib are in a older format not expected by the geoip filter of logstash.

I downloaded the version 2 free database from the maxmind site with the command:

wget http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.mmdb.gz
gunzip GeoLite2-City.mmdb.gz
mv GeoLite2-City.mmdb /etc/logstash/GeoLiteCity.dat

Restarted logstash, and now it does not complain about the GeoLite file being in the wrong format.

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