Regras que foram acrescentadas no firewall .

iptables -A FORWARD í eth1 -p tcp --dport 53 -d 208.67.222.222 -j ACCEPT 

iptables -A FORWARD í eth1 -p udp --dport 53 -d 208.67.222.222 -j ACCEPT 

iptables -A FORWARD í eth1 -p tcp --dport 53 -d 208.67.220.220 -j ACCEPT 

iptables -A FORWARD -i eth1 -p udp --dport 53 -d 208.67.220.220 -j ACCEPT 

Iptables -A FORWARD -i eth1 -p tcp --dport 53 -j DROP

Iptables -A FORWARD -i eth1 -p udp --dport 53 -j DROP