Question

Command line nslookup

Asked by: tdpormc

I'm trying to get hostnames from IP addresses.  Is there a DOS command that would take a list (input file), do an NS lookup and output the results (IP addres, Hostname) to a file?

Thanks

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Asked On
2009-11-03 at 07:46:17ID24867471
Topics

Microsoft Excel Spreadsheet Software

,

MS DOS

,

Windows Batch Scripting

Participating Experts
3
Points
125
Comments
11

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Answers

 

by: stressless-ITPosted on 2009-11-03 at 07:56:11ID: 25730187

 

by: TheNauticanPosted on 2009-11-03 at 08:05:07ID: 25730325

building on the link provided by Stressless-IT here is a batch file that takes in a list of IP address and exports the results to a file

@ECHO OFF
 
SET DeviceList=list.txt
SET ResultFile=NSResults.txt
 
CLS
ECHO.
IF NOT EXIST "%DeviceList%" (
  ECHO Cannot locate Device List: %DeviceList%
  PAUSE>NUL
  GOTO :EOF
)
 
FOR /f "tokens=*" %%M in (%DeviceList%) do CALL :CHECK "%%M"
 
GOTO :EOF
 
:CHECK
SET Device=%1
::SET Device=%~1
::SET Device=%Device: =%
 
nslookup %device% >> %ResultFile%
 
EXIT /B
 
:EOF
:: Cleanup can go here

                                              
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by: tdpormcPosted on 2009-11-03 at 08:13:14ID: 25730428

Thanks!
Is there a way to get it down to a one-liner, showing the IP address and hostname?

 

by: dragon-itPosted on 2009-11-03 at 08:15:16ID: 25730455

Try this I just posted in another q:
http://www.experts-exchange.com/Software/Office_Productivity/Office_Suites/MS_Office/Excel/Q_24867471.html?cid=1576
@echo on
(
 for /f %%p in (iplist.txt) do (
   for /f "tokens=2 delims=[]" %%a in ('ping -n 1 -w 100 %%p^|find "Pinging"') do echo %%p,%%a
 )
) > output.txt

 

by: tdpormcPosted on 2009-11-03 at 08:43:15ID: 25730798

This is a line of the output I get:
C:\testgetip>(for /F "tokens=2 delims=[]" %a in ('ping -n 1 -w 100 10.118.5.2|find "Pinging"') do echo 10.118.5.2,%a )

The IP address is embedded, but no host name is returned.

Thanks.

 

by: dragon-itPosted on 2009-11-03 at 08:51:59ID: 25730914

Ahh that is because you have used an IP address.  When you do a PING of a host name then it resolves the address to an IP and puts it in [] e.g.

ping www.google.co.uk

but when you ping an IP it doesn't.

I imagine that is what it is.

The echo on should be echo off too, sorry.

e.g. with iplist.txt containing

www.google.com

I get:

www.google.com,208.69.34.230

in the output.txt file.  You can make it open in Excel uif you want with:

@echo off
(
 for /f %%p in (iplist.txt) do (
   for /f "tokens=2 delims=[]" %%a in ('ping -n 1 -w 100 %%p^|find "Pinging"') do echo %%p,%%a
 )
) > output.csv
start output.csv

 

by: dragon-itPosted on 2009-11-03 at 09:10:54ID: 25731120

Sorry my mistake but I mis-read you wanting IP from hostname, try this for the opposite:

@echo off
(
 for /f %%p in (iplist.txt) do (
   for /f "tokens=2 delims=[] " %%a in ('ping -a -n 1 -w 100 %%p^|find "Pinging"') do echo %%p,%%a
 )
) > output.txt
notepad output.txt

Still uses ping -a to get the name but it could instead use nslookup and parse the output if needed.

Steve

 

by: dragon-itPosted on 2009-11-03 at 09:13:30ID: 25731146

Or from a (long) command line:

for /f %p in (iplist.txt) do @for /f "tokens=2 delims=[] " %a in ('@ping -a -n 1 -w 100 %p^|find "Pinging"') do @echo %p,%a

 

by: tdpormcPosted on 2009-11-03 at 11:56:17ID: 25732852

The solution works good for about 1/3 of my entries.  Come to find out, there are only a couple of DHCP servers on our network with the entire database, so I need to set one of them as a default.  I know how to do this within NSlookup, but am unfamiliar with how to do it within a batch or commandline.

So close!!

 

by: dragon-itPosted on 2009-11-04 at 06:40:47ID: 25739697

Fair enough.... it will use the DNS server of the local machine to do the lookup (i.e. the one DHCP is providing or whatever).  If you want to to use nslookup instead we can go down that route. Do you want to post a related Q and will see what I can do as you have closed this one off now.

Steve

 

by: tdpormcPosted on 2009-11-04 at 06:53:42ID: 25739862

Will do - NSLookup seems to be a little more robust.

Thanks!

20120131-EE-VQP-002

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