Re: MAC Address and NIC Device on Network.

[vladdrak]

There is a Resource Kit utility called getmac.exe that can prove useful. You'll want to either compile a list of the machines you want to check, or enumerate an NT domain to check those machines. You could also walk IP addresses if you don't have a network browse list built up. Anyways, your code might be:

my @machines=("host1","host2","host3");
my %macs=();

for my $machine (@machines) {
  my $macraw=`getmac $machine`;
  if ($macraw =~ /(match something)/) {
    $macs{$1}=$machine;   
  }  
}

print "$macs{$_} $_\n" for (keys %macs);

Which would fill $macraw with something like this:

Transport Address  Transport Name
-----------------  --------------
00-00-00-00-00-00  \Device\NetbiosSmb
00-A0-B0-6C-38-D0  \Device\NetBT_El90x1

..which you'll clean up with the regex buffer, and then toss it in a hash. The NetBT_El90x just identifies the interface as a 3Com 9xx card. Intels show as E100b, Compaq NetFlex as NetFlx, etc. In Win2k the identifer is actually a GUID that maps back to the driver/service name (joy!). If you have a good idea of what NICs are on your LAN it makes it easier.. you'll probably want to do a dirty scan first on everything, then refine your regex.

Good Luck,
Vlad