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by numpad0 604 days ago
NAT is technically not a firewall in itself, I believe early/some NAT implementations used deterministic assignments between external range to internal ip:port. They can be more transparent if that is the goal.

But the effect of proliferation of cheap Wi-Fi routers with cheap dynamic NAPTs in conjunction with UPnP did to XP-era PC security - 100% agreed, it was like sunlight self-disinfecting brass door handles.