import sys

import os

import commands

drop_ips = { }

rdline = ""

for rdline in sys.stdin:

drop_ip = rdline.split("\n")[0].strip(" ")

str=os.popen("iptables -L -n").read()

lines=str.split("\n")

# load dropped ips from output of iptables

for line in lines:

line=line.split(" ")

if len(line) <= 1:

continue

if line[0] != "DROP":

continue

drop_line = [""]*20

i = 0

for d in line:

if len(d) > 0:

drop_line[i] = d

i = i + 1

else:

pass

if drop_line[0] == "DROP":

if drop_line[3] not in drop_ips:

drop_ips[drop_line[3]] = 1

else:

pass

else:

pass

#for ip in drop_ips:

#cmd = "iptables -D INPUT -s " + ip + " -j DROP"

#print "cmd=%s" %cmd

#os.popen(cmd)

# add the new ip being dropped to iptables

if drop_ip not in drop_ips:

cmd="iptables -I INPUT -s " + drop_ip + " -j DROP"

os.popen(cmd)

print "%s" %cmd