[eraserj]

Just wait until the database of ip and open ports is leaked and hackers start exploiting vulnerabilities of softwares listening to these ports to break into random people devices.

[Erwin]

That database has existed for ages: https://www.shodan.io/

[hedora]

Does Shodan have a map of public ip -> natted local network ip:port pairs?

I thought it was only public ip ports.

[antoinealb]

I don't understand the issue you are describing. You can already scan the entire ipv4 space for cheap with tools like zmap[0]. How does a premade list help ?

In addition, I would expect such a DB to go stale very quickly.

[0] https://zmap.io/

[nerdbaggy]

What is the legality of scanning large subsets that you don’t control?

[hedora]

I think it is generally acceptable for public networks, but eBay is using webrtc to bypass firewalls and then scanning private networks.

That’s illegal in most circumstances (at least in the US).

[whydoyoucare]

Any further pointer on the "illegal" aspect? Thanks.