November 2012
Intermediate to advanced
318 pages
6h 36m
English
Content preview from Nmap 6: Network Exploration and Security Auditing CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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 ...
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