RE: Mapping Class A network ( any easy trick?)

["Moonen, Ralph" <Moonen.Ralph () kpmg nl>]

Hi, 

What is the problem with 17 million pings? If you turn of DNS resolution
it will be quite fast, even on a 10 mbit LAN. Don't use broadcast pings:
you don't know where the subnet boundaries are and therefore won't be
able to know the broadcast addresses. If it really is a /8 network (i.e.
flat, which I doubt) then you could use broadcast pings, but please note
that:
A: not all devices that respond to ping respond to broadcast ping
B: you will miss replies due to the fact that many devices will answer
simultanesouly

You might also want to manage expectations. Pentesting a full class A,
even given low population of the network will take you months. I think
what you really want to do is a vulnerability scan. Just that part,
running nmap and nessus on a full class A will keep you busy for a while
:-) Just make sure the client is aware that not all IP's on his class A
will be hit. 

--Ralph
 

-----Original Message-----
From: John Thomas [mailto:mjohn2000_99 () yahoo com] 
Sent: 08 February 2005 17:42
To: pen-test () securityfocus com
Subject: Mapping Class A network ( any easy trick?)

--- Virus checked / op virussen gecontroleerd ---



I am about to do a penetration testing on a "Class A network" and
wondering how I can map the network without pinging 17 million IPs.(nmap
-Sp 10.0.0.0/8) 

I did some research and the best information I got is from one of the
earlier post on this
list(http://seclists.org/lists/pen-test/2004/Jul/0067.html)
. It was to use broadcast IPs for pings. But it may miss some subnets. 

Is that the best way to it? If not, please advise 


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