Ring seems to work fine within the same network, but NAT is a problem.
Most of my locations are behind an ADSL-router with NAT. Ring's Chat
works fine with NAT, but I cannot get audio (SIP) to work.
The FAQ (https://ring.cx/en/documentation/faq#node-62) instructs that
"you have checked the Allow UPnP setting option". I cannot find such an
option in Ring (Version: 20160915.1.d1fada2~dfsg1-1 Debian Stable amd64)
Does anyone know how to make Ring work with NAT?
Is there a test-procedure to see where things fail?
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