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Let's say I have an internal address of and an external address of 1.222.333.4

My external IP should, by default, be mapped to my internal IP.

But how should I allow connections into my external IP with an iptables rule?

I have no interface set up for the outfacing network, should I create a DHCP outfacing network card (How would I go about doing this, if this is the case?) or should I do it another way? - Maybe with a FORWARD rule? I am not sure. I imagine it would be easier to make an outfacing network card.

Thank you

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Yes, you need a forward rule for the server connection. For Minecraft this would be port 25565 –  the_Seppi Mar 8 '14 at 2:12

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