Block country using iptables
https://www.cyberciti.biz/faq/block-entier-country-using-iptables/
Russia subnets example
http://www.ipdeny.com/ipblocks/data/aggregated/ru-aggregated.zone
Block country using iptables
https://www.cyberciti.biz/faq/block-entier-country-using-iptables/
Russia subnets example
http://www.ipdeny.com/ipblocks/data/aggregated/ru-aggregated.zone