iptables

gistfile1.txt

-A INPUT -i lo -j ACCEPT 
-A OUTPUT -o lo -j ACCEPT
-A OUTPUT -p udp -o eth0 --dport 53 --sport 1024:65535 -j ACCEPT
-A INPUT -p udp -i eth0 --sport 53 --dport 1024:65535 -j ACCEPT
-A OUTPUT -o eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p tcp -i eth0 --dport 22 --sport 1024:65535 -m state --state NEW -j ACCEPT
-A INPUT -p tcp -i eth0 --dport 80 --sport 1024:65535 -m state --state NEW -j ACCEPT
-A OUTPUT -j ACCEPT -m state --state NEW,ESTABLISHED,RELATED -o eth0 -p tcp -m multiport --dport 80,443 -m multiport --sport 1024:65535
-A INPUT -j ACCEPT -m state --state ESTABLISHED,RELATED -i eth0 -p tcp
-A INPUT -j DROP
-A OUTPUT -j DROP
-A FORWARD -j DROP