[Techtalk] Program to determine IPs used in a network

[Daniel Pittman]

Michael Fisher <desnotes at gmail.com> writes:
> On Sat, Jun 20, 2009 at 10:46 PM, Daniel Pittman <daniel at rimspace.net>wrote:
>> Michael Fisher <desnotes at gmail.com> writes:
>>
>> > I am setting up an Digi XBee wireless network for home automation use. It
>> > is a cool system with several sensors measuring temperature, humidity,
>> > light, electricity, etc. and then logs the information for presentation
>> > (i.e.  web, database). The system, from the coordinator on down, uses
>> > Python so in theory, it should be OS neutral. Currently the system
>> > instructions are all written for Windows. I am going through all parts of
>> > the startup and looking to find Linux versions of Window's tools that are
>> > in use.
>> >
>> > The first Digi tool that is Windows-centric is a program that determines
>> > the IP address the gateway uses. What I am looking for is a package that
>> > analyzes a network and lets me know the who, what and where in regards to
>> > IP addresses on a local network. Anyone have any ideas?

[...]

> I should have been clearer when I said I wanted to determine the gateway.
> The gateway I am looking for is the XBee wireless network gateway, not the
> gateway of my network, which you are correct in pointing out both wired and
> wireless.

Oh. :)

> What I am looking for is to be able to see all of the IP addresses currently
> in use so I can make the determinatiion on which one is the XBee gateway
> without logging into my router.

Well, nmap is probably the tool you want here.  I think it is likely, in fact,
that it can perform the same scan (for an appropriate open port)
automatically, but it can also provide a "which hosts exist" scan.

Alternately, I have used fping to determine which hosts exist on the network.
Neither of those is infallible, but they are generally good.

Do you know what the Windows software is actually looking for on the network?
Just an ICMP response, or a specific port, or a magic packet, or?

Regards,
        Daniel