On Sat, 16 Jan 2016 01:55:38 +0300, Reco wrote: >A simple solution: > >iptables -I INPUT -p dcp -s 59.46.71.0/24 -j DROP iptables v1.4.21: unknown protocol "dcp" specified Try `iptables -h' or 'iptables --help' for more information. Should I try the complex solution, or find out what went wrong with the simple one first?