How to block country IP

Here we will provide guide how to block whole country. For this example we will block Palestine - from where most VoIP attacks are originating.

DISCLAIMER - we are not against the Palestine or People of Palestine. We are against hackers from Palestine.

Install ipset tool:

yum -y install ipset

Download list of IP ranges from http://www.ipdeny.com/ipblocks/data/countries/

wget http://www.ipdeny.com/ipblocks/data/countries/ps.zone

Create list in ipset for Palestine IPs:

ipset create palestine hash:net

Import IP list from file to ipset list:

while read LINE; do ipset add palestine $LINE; echo -ne $LINE ' \r'; done < ps.zone

Add rule to iptables, which instructs to drop packets coming from IPs within list:

iptables -I INPUT -m set --match-set palestine src -j DROP

Configuration is completed.

You can repeat same for other countries. By replacing "ps" with two letters code of other country (visit http://www.ipdeny.com/ipblocks/data/countries/ to see whole list). Also replacing "palestine" name to name of other country.

NOTE: configuration needs to be repeated after server reboot.