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kevin11951
February 26th, 2011, 07:23 AM
I was wondering if it is physically possible to detect an extra NAT device on a network?

In other words, you have a large 10.0.0.0/8 network, and you setup your own 192.168.1.0/24 network inside.

Can someone on the 10.0.0.0/8 network detect the NAT device as a NAT device, and not just another host?

down_to_earth_sort_of_guy
February 27th, 2011, 02:42 AM
Here you go...

http://www.sflow.org/detectNAT/

Also, looks like there is a patent application describing a method, but be careful about using patented technology .. will have the potential to go very wrong :-)

google++

Dr. C
February 27th, 2011, 05:39 AM
But can't this be defeated by increasing the TTL of hosts behind the NAT by 1?