Evan Palumbo - 2015-10-15

Hello all,
I have a server running Ubuntu Server 15.04, with Webmin installed. The system has two NICs and is currently functioning as the network's gateway/firewall/router, and serves as a NAT. I would like iptables to pass ALL incoming requests on any port to an internal server (which has been configured with its own firewall). On many firewall boxes they refer to this as a "default host" (or at least they do on my Airport Express). I've tried to configure two DNAT rules to pass this traffic (IP and port for DNAT: server's IP and ports 1-25565, Destination TCP or UDP range 1-25565, incoming interface:my external interface, network protocol TCP or UDP (one rule for both), connection states new and existing connection). There is no firewall past my external interface. What am I missing?

Thanks!