Impossible connection between peers :

"If  one end is a symmetric NAT with a single IP address, then connections  to peers behind other symmetric NATs or behind port-restricted cone NATs  (or port-restricted firewalls) are impossible."
"If one end is a  symmetric NAT with multiple IP addresses, then connections to peers  behind other symmetric NATs or behind address-restricted (and likely  port-restricted) cone NATs (or address-restricted or port-restricted  firewalls) are impossible."
Besides using a central server, is Adobe working hard on turnarounds for this, in order to make p2p on the web available for everybody eventually?
Or is the 'impossible' from these quotes your last word?
Thank you

unfortunately, "impossible" means "it isn't possible".
a symmetric NAT is intrinsically defective and should be replaced with a non-defective unit.

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