Linked by Igor Ljubuncic on Mon 21st Jun 2010 09:35 UTC
Privacy, Security, Encryption I've bored the readers of my personal website to death with two rather prosaic articles debating the Linux security model, in direct relation to Windows and associated claims of wondrous infections and lacks thereof. However, I haven't yet discussed even a single program that you can use on your Linux machine to gauge your security. For my inaugural article for OSNews, I'll leave the conceptual stuff behind, and focus on specific vectors of security, within the world of reason and moderation that I've created and show you how you can bolster a healthy strategy with some tactical polish, namely software.
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RE[3]: insecurity
by fewt on Mon 21st Jun 2010 19:07 UTC in reply to "RE[2]: insecurity"
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"There are a lot of network based attacks that computers without firewalls are vulnerable to.
man in the middle attacks, spoofing, etc."

I don't see how firewall would help you in a MITM attack. There is a publicly available tool called ZXARPS which is able to intercept/change traffic between hosts in the same broadcast domain (eg between yout laptop and default gateway), try to defend your box against that with iptables ;)

Depends on the attack really, a firewall shouldn't be the only line of defense. ;)

"It also keeps ports that shouldn't be exposed to the internet away from the internet. "

The thing is that you are almost always behind a NAT device whether you using your laptop in a corporate network or just at home behind a dsl router but don't get me wrong having a firewall in situations where you for example have a samba server running on your laptop what you need to access when you are home is ok.
Using premade firewall rulesets however what the user in many cases don't understand and probably just an "input only" ruleset doesn't help much.

That is a fair point, but it requires that the user remember to turn on and configure a firewall during times that they aren't protected by some other method.

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