Práctica 2.

sudo iptables -L

sudo iptables -F

sudo iptables -P INPUT ACCEPT
sudo iptables -P OUTPUT ACCEPT
sudo iptables -P FORWARD ACCEPT

sudo iptables -A INPUT -i lo -j ACCEPT

sudo iptables -A OUTPUT -i lo -j ACCEPT
iptables v1.4.4: Can't use -i with OUTPUT


sudo iptables -A INPUT -s 192.168.1.112 -j ACCEPT
sudo iptables -A INPUT -s 192.168.1.12 -p tcp --dport 22 -j ACCEPT


sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 1000 -j DROP


sudo iptables -A INPUT -i eth0 -p tcp --dport 1:1024 -j ACCEPT