this post was submitted on 19 Oct 2023
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Debian Server Essentials: Setup, Configure, and Hardening Your System (alien.top)
submitted 11 months ago by KillerTic@alien.top to c/main@selfhosted.forum
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I am back with another published article.

Ideogram.ai: penguin in a server room covered in ice and snow, whole picture made out of green matrix style lines of code, cinematic

Please be kind! I am a self-taught Linux user and by no means an expert. My goal with this guide is to help newcomers to Linux have an easier and more secure start.

To all the experts out there, please be kind and do share your tips and observations. I am happy to keep updating the article to make the self-hosting world more secure.

https://nerdyarticles.com/debian-server-essentials-setup-configure-and-hardening-your-system/

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[–] KillerTic@alien.top 1 points 11 months ago (1 children)

Personally I disagree. You might be running internal services you do not want to expose. It also is an active step to expose something. This way you are in control what is exposed and what isn’t.

[–] maof97@alien.top 1 points 11 months ago

Yeah until you realize that e.g. docker compose doesn’t care about ufw rules and expose defined ports anyway (yes, through the firewall) and now you can argue that an inexperienced user doesn’t know this and thinks that the ufw will protect him and give him a false sense of security. You should always make sure to bind internal services to 127.0.0.1 only period. Anyway that doesn’t mean ufw is useless, but that it should only be used for filtering more than the default port allow rules because like this you have no security advantage (e.g. I use ufw on my Proxmox servers to block outgoing connection to the lan by default and then explicitly allow connection to server x if needed )