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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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[–] noddy@beehaw.org 1 points 1 month ago (1 children)

I fail to see why this is bad advice. Sure you could just disable the firewall on your computer on a local network. But that's under the assumption that you can trust everything on your local network. What if it's a laptop? Do you also trust any public networks you may connect to on the go? Having firewall both on the router and on your computer provides an additional layer of security, and I think that's good advice in general. You can for example set it up to only allow incoming connections when connected to your home network for example.

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

There is a difference between good practice and fear mongering. You aren't going to lose it all because you didn't turn on the Firewall.

[–] noddy@beehaw.org 1 points 1 month ago

To be fair I haven't configured a firewall either on my laptop. But that's out of lazyness, not out of good practice. Good practice would be to have a firewall enabled. Just because something is unlikely to happen statistically doesn't mean it's bad practice to take steps to protect against it.