Installing a firewall on Ubuntu
Frankly, I'm glad that the default install doesn't set up a firewall. Most of my computers live behind a firewall at all times anyway, and I've always been annoyed by installers that demand I deal with firewall questions when I've already got the situation well in hand. If I want a firewall on a machine, I can set one up on my own. Since Ubuntu is, in part, aimed at corporate desktops, a firewall is unnecessary for many installations.
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