config NETFILTER_XT_MATCH_GEOIP
	tristate '"geoip" match support'
	depends on NETFILTER_XTABLES
	---help---
	This option allows you to match a packet by its source or destination
	country. Basically, you need a country's database containing all
	subnets and associated countries.

	For the complete procedure and understanding, read:
	http://people.netfilter.org/acidfu/geoip/howto/geoip-HOWTO.html