North American Network Operators Group|
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Re: Security gain from NAT
On Mon, 04 Jun 2007 11:32:39 PDT, Jim Shankland said:*No* security gain? No protection against port scans from Bucharest? No protection for a machine that is used in practice only on the local, office LAN? Or to access a single, corporate Web site?
What the firewall *should* be doing? The end devices *should* not need protection in the first place, because they *should* be secure as individual devices. But they are not. So you put a firewall in front of them, and that device *should* give them all the protection they need. But sometimes, it doesn't. So you make end devices unaddressable by normal means, and while it shouldn't give them more security, it turns out it does. No matter how much it shouldn't, and how much we wish it didn't, it does.
The difference between theory and practice is that in theory, there is no difference, but in practice, there is.