Arguing against using public IP space

Doug Barton dougb at
Sun Nov 13 15:48:32 CST 2011

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.



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

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