Disabling an IP using IPTABLE

Question

I am trying to do the following -
1. script_1 which can be executed to at the start to enable all IPs.
2. Whenever we want to block an IP we should call script_2 to block the IP.
3. Whenever we want to unblock an IP we should call script_3 to unblock.
4. script_4 to take the snapshot of the IPtable.

Answer 1

Step1 : Initialize IPTABLE

iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -t raw -F
iptables -t raw -X
iptables -t security -F
iptables -t security -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -A INPUT -j ACCEPT
iptables -A OUTPUT -j ACCEPT
iptables -A FORWARD -j ACCEPT

Step 2: Block the traffic from an IP

iptables -I INPUT 1  -s <IP> -j DROP

Step 3: Commit the changes

/sbin/service iptables save