Any ways to change the MAC address permanently?

Question

Are there?:)

Answer 1

when i was still using netcfg2, i was doing the following to get a randomized, manufacturer-valid mac address every time i connected an access point:
in each network profile:
PRE_UP='. $SUBR_DIR/spoof.subr; ifconfig $INTERFACE down; ifconfig $INTERFACE hw ether $(generate_random_mac)'
the 'ifconfig $INTERFACE down' is necessary for my card, annoying belkin-made rtl8185 pcmcia card.
/usr/lib/network/spoof.subr:
#!/bin/bash
SPOOF_DIR=$SUBR_DIR"spoof/"
SPOOF_VEND_FILE="stefan-maclist.txt"
generate_random_mac() {
echo $(${SPOOF_DIR}/fakeap.pl --vendors ${SPOOF_DIR}${SPOOF_VEND_FILE})
the following is extracted from Black Alchemy Weapons Lab's fakeap.pl
/usr/lib/network/spoof.pl
#!/usr/bin/perl
use strict;
use warnings;
use Getopt::Long;
use Time::HiRes;
use vars
qw( $vendors_opt $wep_opt );
my @vendors = ( "00:00:0C:", "00:00:CE:", "00:00:EF:" );
# load_vendors
# args: none
# rets: none
# Loads vendor mac prefix file into @vendors
sub load_vendors {
@vendors = ();
open( my $FH, "<$vendors_opt" ) or die "Could not open $vendors_opt: $!\n";
while ( my $line = <$FH> ) {
chomp $line;
$line =~ /^(\w\w:\w\w:\w\w)/;
push @vendors, "$1:";
close $FH;
return;
# gen_mac
# args: none
# rets: none
# Returns a random MAC address with first three octets from @vendors
# last three random.
sub gen_mac {
return sprintf(
"%s%02X:%02X:%02X",
$vendors[ int( rand $#vendors ) ],
int( rand 256 ),
int( rand 256 ),
int( rand 256 )
# Main
GetOptions(
"vendors=s" => \$vendors_opt
load_vendors() if $vendors_opt;
my $mac = gen_mac();
print( $mac );
i know of two sources for a list of valid manufacturer mac address triples.  stefan-maclist.txt comes with fakeap.pl.  a much more comprehensive list is the file 'manuf' in the root directory of the wireshark source, but it needs some editing before it will work with the fakeap.pl code snippet.
one thing this doesn't do is avoid using your actual mac address.
Last edited by kludge (2009-01-14 02:16:54)