nanog mailing list archives
Re: Is NAT can provide some kind of protection?
From: Owen DeLong <owen () delong com>
Date: Wed, 12 Jan 2011 11:57:34 -0800
On Jan 12, 2011, at 11:21 AM, Paul Ferguson wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, Jan 12, 2011 at 11:09 AM, Owen DeLong <owen () 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.
Wrong. Repeat the experiment with stateful firewall with default inbound deny and no NAT. Yep... Same results as NAT. NAT != security. Stateful inspection = some security. Next!! Owen
Current thread:
- Re: Is NAT can provide some kind of protection?, (continued)
- Re: Is NAT can provide some kind of protection? Dobbins, Roland (Jan 13)
- Re: Is NAT can provide some kind of protection? Jack Bates (Jan 13)
- Re: Is NAT can provide some kind of protection? William Herrin (Jan 13)
- Re: Is NAT can provide some kind of protection? Jack Bates (Jan 13)
- Re: Is NAT can provide some kind of protection? William Herrin (Jan 13)
- Re: Is NAT can provide some kind of protection? Lamar Owen (Jan 13)
- Re: Is NAT can provide some kind of protection? Owen DeLong (Jan 13)
- Re: Is NAT can provide some kind of protection? Paul Ferguson (Jan 12)
- Re: Is NAT can provide some kind of protection? Steven Kurylo (Jan 12)
- Re: Is NAT can provide some kind of protection? Owen DeLong (Jan 12)
- Re: Is NAT can provide some kind of protection? Scott Helms (Jan 12)
- Re: Is NAT can provide some kind of protection? Chris Adams (Jan 12)
- Re: Is NAT can provide some kind of protection? Scott Helms (Jan 12)
- Re: Is NAT can provide some kind of protection? david raistrick (Jan 12)