nanog mailing list archives

Re: Arguing against using public IP space


From: Doug Barton <dougb () dougbarton us>
Date: Sun, 13 Nov 2011 13:48:32 -0800

On 11/13/2011 13:27, Phil Regnauld wrote:
      That's not exactly correct. NAT doesn't imply firewalling/filtering.
      To illustrate this to customers, I've mounted attacks/scans on
      hosts behind NAT devices, from the interconnect network immediately
      outside: if you can point a route with the ext ip of the NAT device
      as the next hop, it usually just forwards the packets...

Have you written this up anywhere? It would be absolutely awesome to be
able to point the "NAT IS A SECURITY FEATURE!!!" crowd to an actual
demonstration of why it isn't.


Doug

-- 

                "We could put the whole Internet into a book."
                "Too practical."

        Breadth of IT experience, and depth of knowledge in the DNS.
        Yours for the right price.  :)  http://SupersetSolutions.com/



Current thread: