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>Even better not single of my devices living behind only nat in 20+ years was taken over or ransomed.

Yeah, because you didn't turn off the firewall. And/or because your ISP was being nice / competent and not routing packets to you that didn't make sense for your assigned route.

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Still my point is right, NAT traversal hacking is not an issue and is complicated enough to not be practical.

Residential off the shelf routers don’t have firewall for incoming traffic. For business use you always put hardware firewall behind ISP router, I don’t have firewall at home.

> Residential off the shelf routers don’t have firewall for incoming traffic

[citation needed]

This is 100% wrong.. all consumer routers have firewall functionality built in.

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