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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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My personal advice, secure it down to only permitting what needs it, regardless of your trust to the network.
Treat each device as if they've been compromised and the attacker on the compromised device is now trying to move laterally. Example scenario: had you blocked all devices except your laptop or phone to your server, your server wouldn't have been hacked because someone went through a hacked cloud-connected HVAC panel.
I lock down everything and grant access only to devices that should have access. Then on top of that, I enable passwords and 2FA on everything as if it were public... Nothing I self host is public. It's all behind my network firewall and router firewall, and can only be accessed externally by a VPN.