Telling the difference???

Unimatrix_001
Unimatrix_001 used Ask the Experts™
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Hiya,

Can anybody tell me what different ways I can detect if the machine at the other end is a:

router
firewall
proxy
PC

other than going over to the other side of our institute and checking it out?

Thanks
Uni
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Commented:
the first question you have to ask yourself,
do you have the authority to access that pc?

there lots of ways getting to your destination PC/Server.

information require:
1) pc/server/router's access password (eg.: Administrator)
2) IP address if applicable, or computer name

usually by computer name and its description you will know whats the PC/server doing, example UniFW001, User87 etc.

at least once you have to be over the other side, for comfiguration and documentation.

rgds

 

Author

Commented:
Hi,

Thanks for your response. I knew something like having authority would come up some time! :) Yes I've got complete authority over my network. However there are over 150 clients or routers over the institute.

"usually by computer name and its description you will know whats the PC/server doing, example UniFW001, User87 etc."

Yes, but what if its not a PC. What if it a router etc...


Uni

Commented:
download the network mapping program nmap from http://www.insecure.org/nmap/

hope it helps ;)
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Author

Commented:
Thanks, although I'm more interested on some different methods that can be used rather than a program.

I.e. if the IP doesn't resolve to a host name there's a good chance its a firewall/router etc...

...things like that.

Thanks
Uni
Gabriel OrozcoSolution Architect

Commented:
well. it's sort of an easy thing.

if you have all the autority on your network, why not create a dns? if you know every ip in your network, then you can check a table (spreadsheet or something like that) which computer is on the other end.

Author

Commented:
There are some IP's that I don't know though. Yes I can find them out by going over there and checking them out. But is there another way???

What I'm wanting is the way in which to MAKE that database without going over the institute and checking each machine.

Uni
Gabriel OrozcoSolution Architect

Commented:
ho, then try this tool:
ipbrowser from solarwinds suite. it's way good, and even while there are so many opensource tools, this one is very good.

http://www.solarwinds.net

I use it when I want to know what is on a remote network, and figure out what's there.

Author

Commented:
That's the sort of thing, but how does that product work???

Uni

Author

Commented:
i.e. how can it tell the difference between a router and a printer on that network? Or is that up to the user to choose?

Thanks again
Uni
Solution Architect
Commented:
it's something easy:

this software first tries to identify the other equiment by using snmp, then using dns or your own hosts table, then using netbios messages, then etc. etc. etc.

it's good at it.

normally the network printer servers have jetdirect activated, and also do the routers and switches (unless you're using very cheap ones, or have deactivated it)

so, I think that tool can do the job you need, and also you can test it for one month I remember, so it's time enough to map your network.

hope this help.

Author

Commented:
Thanks for that. I'll look into it.

Uni

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