Firewall - should I turn it on ??

Am I protected when surfing if I do not? When I was using Windows XP I always bought Norton Internet Security software (firewall and virus). Should I use Apple's firewall and why is it turned off by default?

The Firewall is turned off by default in OS X because it complicates certain services such as iChat and iTunes music sharing. Most Mac users are likely unaware of its existence. Certainly, if your Mac is used as a server, that is you are purposely making it available over the internet to serve files or web pages, you should configure the Firewall appropriately. That would mean enabling it and blocking all ports/services that your Mac does not serve.
For normal usage, especially if you are behind a typically configured router, you can ignore the Firewall settings and leave it off. In almost all cases, your Mac will not be able to be seen from the outside world.
Just my opinion, of course.
bd

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