I've been trying to block all ports udp,tcp,icmp execpt 80tcp and 53tcp so i can use the internet. The problem is it won't let me use the internet if i block tcp and udp ports. This is the commands i'm using.
iptables -I INPUT -p tcp --dport 80 -j ACCEPT
iptables -I INPUT -p tcp --dport 53 -j ACCEPT
iptables -I INPUT -p tcp -j DROP
iptables -I INPUT -p udp -j DROP
iptables -I INPUT -p icmp -j DROP
Thanks
iptables -I INPUT -p tcp --dport 80 -j ACCEPT
iptables -I INPUT -p tcp --dport 53 -j ACCEPT
iptables -I INPUT -p tcp -j DROP
iptables -I INPUT -p udp -j DROP
iptables -I INPUT -p icmp -j DROP
Thanks