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Can someone explain to me why NAT is not enough for security? (lemmy.world)

submitted 2 years ago* (last edited 2 years ago) by nodsocket@lemmy.world to c/selfhosted@lemmy.world

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Networking noob here. I want to prevent all incoming requests except through a specific port, and that traffic is forwarded to a specific device on the network. NAT seems to do that just fine, it's almost like a kind of firewall by itself. What kind of threats are there that requires more than just NAT for security?

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[–] seang96@spgrn.com 1 points 2 years ago

I haven't setup an IPv6 network yet, but it'd have to physically traverse the packet through your router to reach the connected device still. I imagine a router would still be able to use it's firewall to drop the packet before it gets sent to the endpoint device.