this post was submitted on 06 Oct 2023
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Why not? It's comically easy to set up one.
If you allow the whole subnet you might as well not use a firewall. Your router has one and port forwarding is disabled by default.
Your isp firewall uses nat, and a hacked isp gateway or some other device that had ports forwarded to it are the most likely things to be reaching into your network. They’ll be on that subnet.
Yes, they’re giving “very simplistic” and also demonstrating how to deny and add access in multiple ways.
It’s also not uncommon to do things like that. The default firewall config in Fedora is wide open for every port above 1024.
Yeah, I kind of agree. Unless this is a mobile device pretty much all traffic will come from within your subnet. I often deny incoming from my gateway (i.e. router) and poke holes as necessary.
ufw and docker don't like each other
Can you elaborate on that? I'm curious what you mean.
I din't have much time right now https://www.techrepublic.com/article/how-to-fix-the-docker-and-ufw-security-flaw/
It's quiet old. Maybe it's fixed now.
Thanks. So docker manipulates iptabels directly, thereby bypassing ufw rules. (Your previous comment was just really vague)
It’s also comically useless to have a desktop firewall application installed when you’re already behind some sort of firewall solution like a router not forwarding most incoming traffic.
There's incoming and then there's outgoing traffic. Software firewalls can forbid processes that may be advertised as "offline only" from reaching out; typically a hardware firewall doesn't care about this kind of thing.
That's fine right up until something on your network, even the ISP modem-firewall-router-switch itself, gets compromised.