I am not sure about what the official method is, but since i always run OOMA in the Advanced Networking configuration: i.e. OOMA / OOMA Telo is behind my router, I wrote the following article that shows what works well with the OOMA TeloWhat's the official source for port forwarding info, connecting to the hub to configure its DMZ, etc?
http://www.theunluckyfish.com/archives/ ... -home-port
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David Taylor