6 Aug 2014
iptables -t nat -A PREROUTING -i ethX -p udp --dport 53 -j DNAT --to $(get lan_ipaddr)
iptables -t nat -A PREROUTING -i ethX -p tcp --dport 53 -j DNAT --to $(get lan_ipaddr)
iptables -t nat -L -v -n # shows nat table
melhor:
iptables -t nat -A PREROUTING -s 10.0.100.0/24 -p udp --dport 53 -j DNAT --to 9.9.9.9:53
iptables -t nat -A PREROUTING -s 10.0.100.0/24 -p tcp --dport 53 -j DNAT --to 9.9.9.9:53
http://askubuntu.com/questions/192476/redirect-requests-mapped-to-a-dns…
https://unix.stackexchange.com/questions/144482/iptables-to-redirect-dn…
https://www.debuntu.org/how-to-redirecting-network-traffic-to-a-new-ip-…