Is NAT can provide some kind of protection?

Wed Jan 12 19:21:24 UTC 2011

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On Wed, Jan 12, 2011 at 11:09 AM, Owen DeLong <owen at delong.com> wrote:

> No, NAT doesn't provide additional security. The stateful inspection that
> NAT cannot operate without provides the security. Take away the
> address mangling and the stateful inspection still provides the same
> level of security.
>

There is a least one situation where NAT *does* provide a small amount of
necessary security.

Try this at home, with/without NAT:

1. Buy a new PC with Windows installed
2. Install all security patches needed since the OS was installed

Without NAT, you're unpatched PC will get infected in less than 1 minute.

Cheers,

- - ferg

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-- 
"Fergie", a.k.a. Paul Ferguson
 Engineering Architecture for the Internet
 fergdawgster(at)gmail.com
 ferg's tech blog: http://fergdawg.blogspot.com/