Getting MAC address from IP Address

  • Thread starter Thread starter Jean-Michel Cafagna
  • Start date Start date
J

Jean-Michel Cafagna

Hi all,

I have a question for you,

I'm looking for a way to have the IP address corresponding to a MAC address

I've found this piece of code ( vbs was the original extension ) which gives
me the local IP address but I would like to enter a MAC address ( like
00-01-02-03-04-05 ) and then I would like in return the corresponding IP
address of the remote computer.

I'm not looking for code that gives me the MAC from an IP ( ping 1.1.1.1 and
arp -a will gives the answer)



strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
Set IPConfigSet = objWMIService.ExecQuery("Select IPAddress from
Win32_NetworkAdapterConfiguration where IPEnabled = TRUE")
For Each IPConfig In IPConfigSet
If Not IsNull(IPConfig.IPAddress) Then
For i = LBound(IPConfig.IPAddress) To UBound(IPConfig.IPAddress)
WScript.Echo IPConfig.IPAddress(i)
Next
End If
Next


Thanks for your help
J-Michel
 
You can use nbtstat -A and type the IP address which will return (at the
bottom of the listing) the MAC address. You could write a little script that
tries every possible IP address in the subnet and outputs the results to a
file. Not exactly what you're looking for, but maybe an alternative. (Note:
your computer would have to be in the same broadcast domain as the computers
you're checking).

....kurt
 
You can use nbtstat -A and type the IP address which will return (at the
bottom of the listing) the MAC address. You could write a little script that
tries every possible IP address in the subnet and outputs the results to a
file. Not exactly what you're looking for, but maybe an alternative. (Note:
your computer would have to be in the same broadcast domain as the computers
you're checking).

...kurt
Click to expand...


If you ping an IP number and then do an arp -a the IP number shows
up, so in a script youi can do something like this

ping nn.nn.nn.nn | grep nn.nn.nn.nn

A little more scripting will extract the MAC number from the rest of
the info returned. the IP number has to be in the same mask, of
course.

Am I missing something ?
 
Hi all,

I have a question for you,

I'm looking for a way to have the IP address corresponding to a MAC address

I've found this piece of code ( vbs was the original extension ) which gives
me the local IP address but I would like to enter a MAC address ( like
00-01-02-03-04-05 ) and then I would like in return the corresponding IP
address of the remote computer.

I'm not looking for code that gives me the MAC from an IP ( ping 1.1.1.1 and
arp -a will gives the answer)



strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
Set IPConfigSet = objWMIService.ExecQuery("Select IPAddress from
Win32_NetworkAdapterConfiguration where IPEnabled = TRUE")
For Each IPConfig In IPConfigSet
If Not IsNull(IPConfig.IPAddress) Then
For i = LBound(IPConfig.IPAddress) To UBound(IPConfig.IPAddress)
WScript.Echo IPConfig.IPAddress(i)
Next
End If
Next


Thanks for your help
J-Michel
Click to expand...


If you ping an IP number and get a response then do an arp -a you'll
find the MAC address, which could be grepped in a script.
 
Thanks kurt for your reply but Actually that was not the way I was thinking
doing the things but anyway I'm trying since this morning to write a script
using WSH ( and actually to execute VBscript code ) I wrote the logic but I
still missing a function to first ping a host, and secondly a function to
get the MAC address from the arp table.
I would prefer not to use the commands arp and ping, because I don't know
how to get the correct information and if the ping command fails, I don't
know how and even if it's possible to know the reason it failed


Jean-Michel
PS: I tried nbstat ( Windows XP doesn't have that command ) .
 
Thanks for you reply

but in the way you're leading me, how can I grep the info I need and not
all the rest of the output.

J-Michel
 
Thanks for you reply

but in the way you're leading me, how can I grep the info I need and not
all the rest of the output.

J-Michel
Click to expand...


A small matter of scripting. :-)

I have the unix toolkit on all my machines.


ping can be a PITA to script because it waits and may not time out if
the IP is unreachable, but I imagine that any other network operation
that returns a succeed/fail status on a IP number should populate the
local arp table. If the operation fails then for all practical
purposes the machine doesn't exist.

Look at arp-a and then it's a small matter of programming.
 
Yes,
has you said a small matter of scripting ;-) but the small

anyway I'm writing and learning VBScript code at the same time and I'm sure
I will find the way to success :-)
I have almost the work done but I stil have to write the worst part, finding
the informations collected and write it in a file ( ok writing in a file is
tricky).

J-Michel
 
Finally I've finished the script but I still have to add more functionality
and certainly have a code more "Professionnal", if someone is intrested I
may send the script on the forum or to personnal email addresses.

thanks one more time for the ideas
J-Michel

Jean-Michel Cafagna said:
Yes,
has you said a small matter of scripting ;-) but the small

anyway I'm writing and learning VBScript code at the same time and I'm sure
I will find the way to success :-)
I have almost the work done but I stil have to write the worst part, finding
the informations collected and write it in a file ( ok writing in a file is
tricky).

J-Michel
Click to expand...
 
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