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RE: Discovering network topology
From: "David Gillett" <gillettdavid () fhda edu>
Date: Thu, 15 Feb 2007 17:11:44 -0800

  When I tried a number of tools on our network a few years back,
all of them ran into difficulties with unnumbered links, trunks,
secondary addresses, and redundant routing.  And that was just 
layer 3 -- none of them came close on the layer 2 map....

David Gillett


-----Original Message-----
From: listbounce () securityfocus com 
[mailto:listbounce () securityfocus com] On Behalf Of David Rosenhan
Sent: Thursday, February 15, 2007 8:07 AM
To: Jeremy; security-basics () securityfocus com
Subject: RE: Discovering network topology

Solar Winds has some nice tools for this when it comes to discovery...
however I have found that just about any of the tools out 
there that do this have one flaw or another.  You just need 
to try a few out that people mention here and see which one 
you like best.

Most of them have evaluation options.

David R

-----Original Message-----
From: listbounce () securityfocus com 
[mailto:listbounce () securityfocus com]
On Behalf Of Jeremy
Sent: Thursday, February 15, 2007 1:33 AM
To: security-basics () securityfocus com
Subject: Discovering network topology

Hi list,

   I was wondering if there were special ways to discover 
networks topologies / mapping networks.  Are there particular 
tools or methods I should be aware of ?  The few tools I 
tried only gave me approximative results.  However I think 
nmap + the standard unix tools can do a good part of the job.

   Moreover, what are the differences between discovering an 
organisation's network from the inside, and from the outside ?
I mean, what are the best practices to discover network 
equipments, subnets, VPNs, etc?  I know that traceroute can 
be a good starting point, but are

there some other tools and techniques I should know ?

Regards,

--
Jeremy



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