Do you want to block visitors by country?
Select the countries you want to block, IP address version (IPv4 or IPv6), output format and press the "Download" button.

The output formats supported are Apache .htaccess, Linux iptables, CIDR, Netmask, Inverse Netmask, IIS web.config, Cisco ACL, PeerGuardian2, network-object, Cisco bit bucket, Juniper Junos and MicroTik. Please find the details below:

Sadly, most of the "attacks" on my home network appear to originate from China. I say "appear to originate" because there's really way for me to be sure; it is possible that a hacker in Europe, or elsewhere, has a network of compromised computers in China all pounding away on American systems. To American system administrators, it looks like the attacks originate in China but anyone could be behind the mischief. Heck, even my next door neighbor could be behind the attacks.

In order to block an IP on your Linux server you need to use iptables tools (administration tool for IPv4 packet filtering and NAT) and netfilter firewall. First you need to log into shell as root user. To block an IP address you need to type the iptables command as follows: