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Not all NAT's are relevant. As long as they respond to port mapping requests or use endpoint independent mappings they can be traversed. Also note that IPv6 al
by the8472 8y ago
Not all NAT's are relevant. As long as they respond to port mapping requests or use endpoint independent mappings they can be traversed.
Also note that IPv6 alone does not help because the recommended way to deploy it is to have firewalls in CPEs that block incoming connections by default, so applications still have to request the port to be opened, using the same protocols as for v4 NAT.