#!/bin/bash
echo -e "****************Welcome*************"
checkstatus()
{
opt_checkstatus=1
while [ $opt_checkstatus != 7 ]
do
clear
#echo -e "\nChoose the Option Bellow!!!\n
echo -e "\n\t*****Note: Save your Iptables before stop/Restart the iptables Services*****\n"
echo -e " 1. Save the iptables\n
2. Status of Iptables\n
3. Start iptables Services\n
4. Stop iptables Services\n
5. Restart iptable Services\n
6. Flush iptables (**Use Carefully_it will remove all the rules from iptables**)\n
7. Go back to Main Menu"
read opt_checkstatus
case $opt_checkstatus in
1) echo -e "*******************************************************\n"
/etc/init.d/iptables save
echo -e "\n*******************************************************\n"
echo -e "Press Enter key to Continue..."
read temp;;
2) echo -e "*******************************************************\n"
/etc/init.d/iptables status
echo -e "*******************************************************"
echo -e "Press Enter key to Continue..."
read temp;;
3) echo -e "*******************************************************\n"
/etc/init.d/iptables start
echo -e "*******************************************************\n"
echo -e "Press Enter key to Continue..."
read temp;;
4) echo -e "*******************************************************\n"
/etc/init.d/iptables stop
echo -e "*******************************************************\n"
echo -e "Press Enter key to Continue..."
read temp;;
5) echo -e "*******************************************************\n"
/etc/init.d/iptables restart
echo -e "*******************************************************\n"
echo -e "Press Enter key to Continue..."
read temp;;
6) iptables -F
echo -e "*******************************************************"
echo -e "All the Rules from the Iptables are Flushed!!!"
echo -e "*******************************************************\n"
echo -e "Press Enter key to Continue..."
read temp;;
7) main;;
*) echo -e "Wrong Option Selected!!!"
esac
done
}
###############################BUILD FIREWALL PROGRAM BEGINS FROM HERE###############################
buildfirewall()
{
###############Getting the Chain############
echo -e "Using Which Chain of Filter Table?\n
1. INPUT
2. OUTPUT
3. Forward"
read opt_ch
case $opt_ch in
1) chain="INPUT" ;;
2) chain="OUTPUT" ;;
3) chain="FORWARD" ;;
*) echo -e "Wrong Option Selected!!!"
esac
#########Getting Source IP Address##########
#Label
echo -e "
1. Firewall using Single Source IP\n
2. Firewall using Source Subnet\n
3. Firewall using for All Source Networks\n"
read opt_ip
case $opt_ip in
1) echo -e "\nPlease Enter the IP Address of the Source"
read ip_source ;;
2) echo -e "\nPlease Enter the Source Subnet (e.g 192.168.10.0/24)"
read ip_source ;;
3) ip_source="0/0" ;;
#4) ip_source = "NULL" ;;
*) echo -e "Wrong Option Selected"
esac
#########Getting Destination IP Address##########
echo -e "
1. Firewall using Single Destination IP\n
2. Firewall using Destination Subnet\n
3. Firewall using for All Destination Networks\n"
read opt_ip
case $opt_ip in
1) echo -e "\nPlease Enter the IP Address of the Destination"
read ip_dest ;;
2) echo -e "\nPlease Enter the Destination Subnet (e.g 192.168.10.0/24)"
read ip_dest ;;
3) ip_dest="0/0" ;;
#4) ip_dest = "NULL" ;;
*) echo -e "Wrong Option Selected"
esac
###############Getting the Protocol#############
echo -e "
1. Block All Traffic of TCP
2. Block Specific TCP Service
3. Block Specific Port
4. Using no Protocol"
read proto_ch
case $proto_ch in
1) proto=TCP ;;
2) echo -e "Enter the TCP Service Name: (CAPITAL LETTERS!!!)"
read proto ;;
3) echo -e "Enter the Port Name: (CAPITAL LETTERS!!!)"
read proto ;;
4) proto="NULL" ;;
*) echo -e "Wrong option Selected!!!"
esac
#############What to do With Rule#############
echo -e "What to do with Rule?
1. Accept the Packet
2. Reject the Packet
3. Drop the Packet
4. Create Log"
read rule_ch
case $rule_ch in
1) rule="ACCEPT" ;;
2) rule="REJECT" ;;
3) rule="DROP" ;;
4) rule="LOG" ;;
esac
###################Generating the Rule####################
echo -e "\n\tPress Enter key to Generate the Complete Rule!!!"
read temp
echo -e "The Generated Rule is \n"
if [ $proto == "NULL" ]; then
echo -e "\niptables -A $chain -s $ip_source -d $ip_dest -j $rule\n"
gen=1
else
echo -e "\niptables -A $chain -s $ip_source -d $ip_dest -p $proto -j $rule\n"
gen=2
fi
echo -e "\n\tDo you want to Enter the Above rule to the IPTABLES? Yes=1 , No=2"
read yesno
if [ $yesno == 1 ] && [ $gen == 1 ]; then
iptables -A $chain -s $ip_source -d $ip_dest -j $rule
else if [ $yesno == 1 ] && [ $gen == 2 ]; then
iptables -A $chain -s $ip_source -d $ip_dest -p $proto -j $rule
else if [ $yesno == 2 ]; then
main
fi
fi
fi
}
main()
{
ROOT_UID=0
if [ $UID == $ROOT_UID ];
then
clear
opt_main=1
while [ $opt_main != 4 ]
do
echo -e "############################################# \n"
#############Check Whether the iptables installed or not############
echo -e "\t*****Main Menu*****\n
1. Check Iptables Package\n
2. Iptables Services\n
3. Build Your Firewall with Iptables\n
4. Exit"
read opt_main
case $opt_main in
1) echo -e "******************************"
rpm -q iptables
echo -e "******************************" ;;
2) checkstatus ;;
3) buildfirewall ;;
4) exit 0 ;;
*) echo -e "Wrong option Selected!!!"
esac
done
else
echo -e "You Must be the ROOT to Perfom this Task!!!"
fi
}
main
exit 0
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