[throw0101a]

> A NAT (whether ipv4 or ipv6) will obfuscate how many devices are on the network. Whether that is desirable depends on the circumstances.

"Revisiting IoT Fingerprinting behind a NAT":

* https://par.nsf.gov/servlets/purl/10332218

"Study on OS Fingerprinting and NAT/Tethering based on DNS Log Analysis":

* https://www.irtf.org/raim-2015-papers/raim-2015-paper21.pdf

Also:

> […] In this paper, we design an efficient and scalable system via spatial-temporal traffic fingerprinting from an ISP’s perspective in consideration of practical issues like learning- testing asymmetry. Our system can accurately identify typical IoT devices in a network, with the additional capability of identifying what devices are hidden behind NAT and the number of each type of device that share the same IP address. […]

* https://www.thucloud.com/zhenhua/papers/TON'22%20Hidden_IoT....

Thinking you're hiding things because you're behind a NAT is security theatre.