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Do I really need a firewall for my server?
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this post was submitted on 24 Mar 2025
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Are you saying that NAT isn’t effectively a firewall or that a NAT firewall isn’t effectively a firewall?
NAT simply maps IPS across subnet boundaries in such a way that upstream routing tables don't need updating.
If you use destination NAT forward rules to facilitate specific destination port access, you are using a firewall.
What sort of isp supplied residential equipment doesn’t block inbound connections? Pedantically, you’re correct.