I've got the port forwarding working from an external network so that piece seems to be fine.
When I test the skill, it keeps giving me the "I don't understand" response. I've followed the all the steps perfectly (even repeated them several times). When I copy my service request from the developer portal and paste it into the Lambda test - the only error I'm noticing is that it keeps showing that the Path is not defined.
Any ideas as to what might be going on?