I would like to block all countries except mine in iptables, that is a list with about 100.000 Entries.
How can I define this blacklist file in a script, so iptables blocks all those IP ranges?
Maybe I can use: http://www.ipdeny.com/ipblocks/data/countries/ that provides lists in the form
126.96.36.199/20 188.8.131.52/21 184.108.40.206/21 220.127.116.11/21 ...
I want to be able to change the blacklistfile easily without having to change the iptables-script.