I find that if i set these rules :
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP
This shud basically block my entire network . But still I am able to use DHCP . Which leaves me confused and happy
I am confused with this behavior but I am happy my requirement is satisfied with ease but im still interested in knowing the reason. Please help me out if anyone has a clue. Thanks !