RE: Discovering network topology

I think HP Openview Network Node Manager is the answer, it even has
Layer 2 level mapping..

http://openview.hp.com/products/nnm/index.html

...Ramki

-----Original Message-----
From: listbounce@xxxxxxxxxxxxxxxxx
[mailto:listbounce@xxxxxxxxxxxxxxxxx] On Behalf Of David Gillett
Sent: Friday, February 16, 2007 6:42 AM
To: 'David Rosenhan'; 'Jeremy'; security-basics@xxxxxxxxxxxxxxxxx
Subject: RE: Discovering network topology

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@xxxxxxxxxxxxxxxxx
[mailto:listbounce@xxxxxxxxxxxxxxxxx] On Behalf Of David Rosenhan
Sent: Thursday, February 15, 2007 8:07 AM
To: Jeremy; security-basics@xxxxxxxxxxxxxxxxx
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@xxxxxxxxxxxxxxxxx
[mailto:listbounce@xxxxxxxxxxxxxxxxx]
On Behalf Of Jeremy
Sent: Thursday, February 15, 2007 1:33 AM
To: security-basics@xxxxxxxxxxxxxxxxx
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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