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manifex@sh.itjust.works

NAT vs firewall at home (programming.dev)

submitted 1 week ago by emotional_soup_88@programming.dev to c/networking@sh.itjust.works

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Why would I need to have software firewalls on my devices behind my NAT router at home? The topology is a basic consumer grade one: ISP -> my router (NAT) -> LAN, and vice versa.

If NAT already obfuscates my private addresses through translation, how would a potential adversary connect to anything beyond it?

What "good" would my public IP do for a hacker if I have no ports forwarded?

Is a firewall a second line of defense just in case I execute malware that starts forwarding ports?

I do have software firewalls on all my devices, but that wasn't an informed choice. I just followed the Arch Wiki's post installation guidelines.

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[–] borari@lemmy.dbzer0.com 1 points 1 week ago

Typically you’d just run a bind C2 implant on the User machine that reaches out to the attackers C2 servers to retrieve cached commands to execute. Yeah NAT isn’t going to stop it, but tbh a stateful firewall isn’t really gonna stop it either.