First Reference
Second Reference
Block entire countries on Ubuntu server with Xtables and GeoIP
Third Reference
Significant Changes to Accessing and Using GeoLite2 Databases
Fourth Reference
Install and edit your configuration file adding your User and Key
/etc/GeoIP.conf
Then run:
/usr/bin/geoipupdate
Date is located on
/usr/share/GeoIP/GeoLite2-Country.mmdb
Option to block using apache
If you want to block using Apache module then you can try this also :
MaxMindDBEnable On
MaxMindDBFile DB /path/to/GeoIP/GeoLite2-Country.mmdb
MaxMindDBEnv MM_COUNTRY_CODE DB/country/iso_code
SetEnvIf MM_COUNTRY_CODE ^(CN|RU|DE|FR) BlockCountry
Deny from env=BlockCountry
Using IP Tables
sudo iptables -A INPUT -m geoip --src-cc RU -j DROP
--src-cc DE being the country
apt-get install mmdb-bin mmdblookup --file /usr/share/GeoIP/GeoLite2-Country.mmdb --ip 8.8.8.8 http://w ww.mailserverguru.com/iptables-geoip-blocking-ubuntu-16-04-18-04/