Configure DNAT on Linux machine with iptables
From AcrodusWiki
This command quickly configures DNAT rules. This was used to provide services running in containers by forwarding the traffic onto the lxc-bridge private network from the public address.
iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-destination {private address on lxc-bridge network}