Have you tried a reverse lookup ping?
ping -a IP?
Should return workstation name.
or try using nslookup.. should give you DNS entries and all
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Question
How to find a machine name of a computer on my domain.
This started with an IP address conflict error message. The machine will ping, but I can't get into it remotely at all. I downloaded the Look@LAN tool as suggested from a similar question posting, and the program is telling me that the machine isn't windows and that it can't resolve the host name.
In the firewall there is no DHCP lease for the IP. Also, the IP address isn't listed on the domain controller. Assuming its a static IP, how can I find the host name?
Thank you.
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Answers
it is going to be very difficult to determine this if someone plugged a device into your network with a static IP that conflicts with a DHCP'd device you have. Best bet would be to exclude this IP in your DHCP server while you track it down. This way you won't have a conflict. If you have a firewall, set a rule on it to block all outbound traffice from this IP address.
The thing I would try, is during your maintenance window, run a ping -t of the IP address while you unplug each cable 1 at a time from that switch until you figure out which port it is plugged into.
This is going to take some manual troubleshooting
if you can ping, but can't ping -a (because the device isn't registering with your DNS), and you don't have managed switched to determine which port the ip is running on I can't think of another method, unless:
You could try and do a ping with very large packets (ping -l 2048) and watch your switch port lights. You should see one flashing very regularly as teh large ping packets hit it every cycle. This "may" tip you off as to which port it is in. Don't confuse it with the station you are pinging from.
Ok....guessing you're wanting the hostname to identify what kind of device and where the host is.
You can use Nmap to do OS detection, so if it's a printer, wireless access point or whatever then you'll be able to work out what it is and then hopefully locate it.
Download nmap from http://insecure.org and install. The command to perform OS detection is:
nmap -O <IP Address>
eg.
nmap -vv -O 10.204.4.231
The output for this will be similar to:
Host 10.204.4.231 appears to be up ... good.
Interesting ports on 10.204.4.231:
Not shown: 1713 closed ports
PORT STATE SERVICE
80/tcp open http
MAC Address: 00:0F:B5:9D:83:E1 (Netgear)
Device type: general purpose
Running: Linux 2.4.X
OS details: Linux 2.4.18 - 2.4.32 (likely embedded)
Hope this helps
Okay, got that program and ran the command 'nmap -O <ip>' and got the following results...
Starting Nmap 4.76 ( http://nmap.org ) at 2008-09-16 09:39 Central Daylight Time
All 1000 scanned ports on 192.168.xx.xx are closed
MAC Address: A1:B2:C3:D4:E5:F6 (Dell)
Too many fingerprints match this host to give specific OS details
Network Distance: 1 hop
OS detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 17.05 seconds
It appears I've been given another clue; that this device is a Dell of some kind? I'm going to play around with this software a bit more; in the mean time, do you know any other commands that could reveal more information? Thanks!
The -vv switch gives "very verbose" output, so that might help a little....
The output that you have says that it's a Dell from the MAC address that it has, so the NIC at least is Dell!
It's also worth noting that the 1000 most common service ports are closed....which means that it's unlikely to be a PC, Printer, Router or Wireless Access point, although it is possible that it's firewalled to only accept connections from a specific source....
My guess is that the device might be a managed switch.....
You can get aggressive with the scanning using the following:
nmap -T Aggressive -P0 -sT -p 1-65535 -vv <IP>
This might give you more clues....
Let me know how you get on or if you have any more questions :)
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by: ubsocPosted on 2008-09-15 at 12:01:19ID: 22481821
You mmight have to trace it down through your switches. Check your switch logs to see where the IP address is plugged into. From there hopefully you know where your ports are connected to and you should be able to go to the room and "deal with them" :>)