The concept of a firewall still brings to mind the picture of an impenetrable brick wall, the unsurpassable magic protector of all that is good. The bold statements made by today's security vendors only emphasize this, with claims of complete and automatic security, with a wall able to block all perils dead in their tracks using logic that perhaps didn't exist two years ago. But what if in reality the wall of the firewall is made of straw?
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A firewall only enforces ports either being open or closed, which in turn are, opened or closed, by programs on your computer. Encryption does not affect a firewall one way or another. Lastly, firewalls do not deal with viruses at all, but rather only do what I mentioned in the first sentence.
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