this post was submitted on 26 Feb 2024
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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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[–] Chewy7324@discuss.tchncs.de 2 points 8 months ago

The global IPv6 address is usually not directly reachable from the internet for incoming traffic. There's still the router with a firewall which blocks all incoming connections, so having an IP for each device doesn't make a difference for security.
With IPv6 ports still have to be forwarded on consumer routers by default, the main difference is that it doesn't have to be translated to a different IP.

This also means I can have multiple hosts on my home network listening on the same ports, because their public IP's are different.