RE: Find out the subnetting of a company

[Liberty.Anthony () Datacraft-Asia com]

If I'm not wrong Hping can do subnet request too.
Just see the help and set your ICMP Type (default is echo request)

Cheers.
--thony-- 

-----Original Message-----
From: David M. Zendzian [mailto:dmz () dmzs com] 
Sent: Tuesday, July 20, 2004 11:54 PM
To: dsr () ascure com; il.prof () virgilio it; pen-test () securityfocus com
Subject: Re: Find out the subnetting of a company

Isn't there some icmp or ip based packet that can be sent to most devices
querying the subnet theyare in? I am on vacation with only blackberry and
can't google it, but someone out there must be familiar with that??
-----Original Message-----
From: "Dieter Sarrazyn" <dsr () ascure com>
Date: Tue, 20 Jul 2004 08:38:42
To:<il.prof () virgilio it>, <pen-test () securityfocus com>
Subject: RE: Find out the subnetting of a company

Hi,

You can find lot's of the subnet structure with ping & traceroute scans
already. First, you can use the ping functionality of nmap (nmap -sP) which
should give you information about network and broadcast addresses.
If you found these parts, you already know how the subnetting is done.
With traceroute, you'll find out how these subnets are connected to
eachother.

Of course, if there's a router that has snmp enabled, try to find one of the
community strings & dump the routing table of this router...

Hope this helps.

regards,
Dieter 

> -----Original Message-----
> From: il.prof () virgilio it [mailto:il.prof () virgilio it]
> Sent: donderdag 15 juli 2004 10:17
> To: pen-test () securityfocus com
> Subject: Find out the subnetting of a company
>
> During an internal black-box penetration test, from a subnet of a 
> company (with or without DHCP), how do you find out the structure of 
> the other subnets of network? In particular, how do you 
> determine/discover the subnetting of the IP space of a company?
>
> An example:
>
> - IP network of the company XYZ: 10.0.0.0/8 (I use a private class to 
> avoid the use of a real address space)
> - I?m in the subnet 10.0.0.0/24
>
> How do you find out the structure of other subnets that are part of 
> the network 10.0.0.0/8?
>
> Il Prof.



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 David M. Zendzian * dmz () dmzs com
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