What is the best firewall software for Ubuntu?

I am starting an Ubuntu home server, and I'm wondering what the best firewall software is that's compatible with Ubuntu. For example, Gufw or Fire Starter. Some Pros and Cons would be nice too! Thanks! -Shadow Ops

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Seriously?
Ubuntu does not even need a firewall, it has no viruses. Why would you even bother slowing down your computer with firewalls?


Ubuntu != Viruses