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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Firewalls: what SHOULD I block? (lemmy.wtf)

submitted 1 month ago by Cornflake_Dog@lemmy.wtf to c/linux@lemmy.ml

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Hey there folks,

I'm trying to figure out how to configure my UFW, and I'm just not sure where to start. What can I do to see the intetnet traffic from individual apps so I can know what I might want to block? This is just my personal computer and I'm a total newbie to configuring firewalls so I'm just not sure how to go about it. Most online guides seem to assume one already knows what they want to block but I don't even know how/where to monitor local traffic to figure out what I can/should consider blocking.

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[–] possiblylinux127@lemmy.zip 2 points 1 month ago (1 children)

I would advise that you ignore a lot if the advise here and do your own research. You probably don't need a local Firewall and if you want to block content use DNS and browser extensions

[–] forbiddenlake@lemmy.world 3 points 1 month ago (1 children)

You probably don't need a local Firewall

If the computer never leaves the house, maybe. If it's ever on public Wi-Fi though, default deny inbound at a bare minimum. Linux computers with cups installed and running but no firewall were revealed yesterday to be vulnerable to RCE.

[–] possiblylinux127@lemmy.zip 1 points 1 month ago

Cups only listens on local host only by default. Also it requires you to connect to a printer which is unaffected by the Firewall.