Create /root/iptables/blocked.ips file as follows with list of ips and subnets to block entering your dedicated server:
1 2 3 4 | 192.168.1.0/24 202.54.1.2 # spam 202.5.1.2 |
Call following script from your existing shell script:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | #!/bin/bash # Simple iptables IP/subnet block script # ------------------------------------------------------------------------- # Copyright (c) 2004 nixCraft project <http://www.cyberciti.biz/fb/> # This script is licensed under GNU GPL version 2.0 or above # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ---------------------------------------------------------------------- IPT=/sbin/iptables SPAMLIST="spamlist" SPAMDROPMSG="SPAM LIST DROP" BADIPS=$(egrep -v -E "^#|^$" /root/iptables/blocked.ips) # create a new iptables list $IPT -N $SPAMLIST for ipblock in $BADIPS do $IPT -A $SPAMLIST -s $ipblock -j LOG --log-prefix "$SPAMDROPMSG" $IPT -A $SPAMLIST -s $ipblock -j DROP done $IPT -I INPUT -j $SPAMLIST $IPT -I OUTPUT -j $SPAMLIST $IPT -I FORWARD -j $SPAMLIST |
9 comment
i have a ip that i want to block 78.47.53.243 in my dreambox ???
please..
great script!
thanks for this script..
btw i have some error with “BADIPS=$(egrep -v -E “^#|^$” /root/iptables/blocked.ips)”
with -E swich… i change it to -e and its work fine
in egrep –help no -E option
ubuntu 10.04
hi i new to iptables where exactly should i write this script any help
please
thanks for any help appreciated.
i wanna allow just this ip [10.0.0.100 – 10.0.0.112, 10.0.0.2, 10.0.0.3] and block other ip how is the configuration.
please send to my email : nseshop@gmail.com
thanks very much
hi
everybody now will come big platform
I think rule
$IPT -I OUTPUT -j $SPAMLIST
is incorrect. Because in this case $ipblock is destination (-d), not source (-s)
How can I remove ip’s from blocked
Dear Reader.
you can remove IP from block by this short command
#iptables -D input -s 172.20.7.12 IP ADDRESS -j DROP
172.20.7.12 is an example you can remove any IP that you want just type instate