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A comment on India is leading IPv6 migration with 61.67% adoption. Parent comment

Re:India is leading IPv6 migration with 61.67% adoption by WanderPanda on Sunday August 15, 2021 @01:58PM (#28190780)
> NAT-upon-NAT(-upon-NAT)

But there is also a fundamental limit of 2^16 = 65536 concurrent connections, right?

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Re:India is leading IPv6 migration with 61.67% adoption by 2fastpost on Sunday August 15, 2021 @04:53PM (#28192439)
Yes, from one NAT IP using the same protocol to a single public IP using a particular port. Change any of those and you can do 2^16 concurrent connections more per change.

In other words, NAT works on the five-tuple of: protocol, source IP, source port, destination IP and destination port.

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