Detecting NAT with Nping
Nping was designed for packet crafting and traffic analysis and is perfect for a variety of networking tasks.
The following recipe will introduce Nping by showing how to perform NAT detection with some help of the Nping Echo protocol.
How to do it...
Open a terminal and enter the following command:
# nping --ec "public" -c 1 echo.nmap.org
This will result in an output stream similar to the following example:
Nping will return the packet traffic between the client and the Nping echo server echo.nmap.org:
Starting Nping 0.5.59BETA1 ( http://nmap.org/nping ) at 2011-10-27 16:59 PDT SENT (1.1453s) ICMP 192.168.1.102 > 74.207.244.221 Echo request (type=8/code=0) ttl=64 id=47754 iplen=28 CAPT (1.1929s) ICMP 187.136.56.27 > 74.207.244.221 ...
Get Nmap 6: Network Exploration and Security Auditing Cookbook now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
