Re: nmap Discover others question

[ToddAndMargo <ToddAndMargo () zoho com>]

On 09/23/2013 02:42 AM, Ansgar Wiechers wrote:
> On 2013-09-22 ToddAndMargo wrote:
> >    Using NMap from the command line, I would like to discover what all
> > is attached to the Ethernet.  This run string seems to fulfill the
> > request:
> >
> >         nmap -O -v 192.168.255.0/24
> >
> > Question: what about devices that do not use this network?
>
> They won't be discovered.
>
> > Is this not a issue, as they couldn't communicate anyway?
>
> They can't communicate via TCP/IP in the network 192.168.255.0/24. They
> may be able to communicate just fine on different networks or using
> different protocols.

Thought so, thank you.

> > If they are connected though a "route" command, would they not show up
> > anyway?
>
> That question doesn't make any sense. The "route" command sets or
> displays routes, i.e. next-hop destinations for packets. It doesn't
> "connect" anything.

I think I was not clear in how I asked the question.
This is the "route" command I am speaking of.  And,
it "does" connect two different network together.
Note the "ADD" command in the example.

   1) open a DOS prompt in Windows:
   2) enter "route /?"
      Manipulates network routing tables.
      ROUTE [-f] [-p] [command [destination]
         [MASK netmask]  [gateway] [METRIC metric]  [IF interface]
      ...
      Examples:
         > route ADD 157.0.0.0 MASK 255.0.0.0  157.55.80.1 METRIC 3 IF 2
             destination^      ^mask      ^gateway     metric^    ^
                                                         Interface^

So, if someone on a different network is using the "route" command
to connect to your network, will they show up?

> This will probably sound blunt, but you definitely need to work on your
> network basics, particularly TCP/IP and Ethernet. This mailing list is
> not the right place for filling the gaps you obviously have.

No problem.  I try to break down questions into their simplest
elements.  Sometimes is throws folks off.

And, this is the correct group.  From:
http://seclists.org/
       Security Basics — A high-volume list which permits people
       to ask "stupid questions" without being derided as "n00bs".
       I recommend this list to network security newbies, but
       be sure to read Bugtraq and other lists as well.

Thank you for all the help on this and all my other questions.

-T


> Regards
> Ansgar Wiechers


--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Computers are like air conditioners.
They malfunction when you open windows
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