"Your Machine MAC Address is Invalid"?

Hi,
I need to use a software that is based on Adobe Air but got trouble with my MAC address. So, every time I try to login to the software, it's always failed and "your machine MAC address is invalid".
There's a question that kept popping up after the installation and it hasn't appeared anymore after I click "Always Allow". Any idea what should I do to get this fixed? Because all other MAC users can use this software well.
Thanks!

- The MAC address you wrote is of the right format. Since it is unique to each device I can't tell if it is the one for your iPod. Are you sure that the password you entered is correct? Unless you turned it off, the first letter you entered is automatically capitalized. Carefully check each letter as you enter it. Also, some users have turned of Auto-Fill in Settings>Safari to get the password to work.
- Have you powered off and then back on your router
- Have you reset network settings:
Settings>General>Reset Network Settings
- Reset your iPod
Press and hold the On/Off Sleep/Wake button and the Home
button at the same time for at least ten seconds, until the Apple logo appears.
- The troubleshooting here:
http://support.apple.com/kb/TS1398
Entering the iPod's MAC address only helps if the router is set up to filter connections via the Mac address.

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Wi-fi MAC address is invalid

Hi, i have a netgear router and i tried to access the wi-fi. It said that the password was incorrect, yet it was. I tried registering the MAC address into the router, but apparently the address is invalid. My address is F0:B4:79:62:0B:50, is that address valid? and if not, what do i do?
thx, Connor

- The MAC address you wrote is of the right format. Since it is unique to each device I can't tell if it is the one for your iPod. Are you sure that the password you entered is correct? Unless you turned it off, the first letter you entered is automatically capitalized. Carefully check each letter as you enter it. Also, some users have turned of Auto-Fill in Settings>Safari to get the password to work.
- Have you powered off and then back on your router
- Have you reset network settings:
Settings>General>Reset Network Settings
- Reset your iPod
Press and hold the On/Off Sleep/Wake button and the Home
button at the same time for at least ten seconds, until the Apple logo appears.
- The troubleshooting here:
http://support.apple.com/kb/TS1398
Entering the iPod's MAC address only helps if the router is set up to filter connections via the Mac address.

Changing MAC address on wrt300n

So what did I learn today ... never let your little brother on your PC when logged in at a forum ! Result = kicked out, profile deleted, IP banned !
So I gather that my ISP has only static IP's and they suggest to change my MAC address to get a new IP so I can return to the forum and sign up again with a new profile. So the question is ... how the heck do I change the MAC address on the router ? Anyone have a source that I can read up on this ? This is all very new to me.
Thanks in advance.

MAC addresses are like DNA. There are no two matching ANYWHERE in the world (each device in the world has a unique hexidecimal MAC address and no two are alike). Therefore you cannot change your MAC address.
What I can tell you is what your ISP really means. When you connect your router (which has a MAC address) to their modem, their modem memorizes your devices MAC address and assigns it an IP address. You need to make the modem forget this MAC to get a new IP.
To do this, turn off your modem and old router and leave it off for a bit (10 min). Borrow someone elses router (or if you have an old router, use it). Connect it. Turn on modem and new router. Leave on for about 15 min so that your ISP forgets the old MAC address of your original router and creates a new IP address under the new MAC address of the newly connected router.
After 15 min, power them both down again, disconnect the temp router and connect your original router. Power them back up and wait 15 min again. You *should* get a new static IP from your ISP as it thinks it's a new MAC again. The ISP doesn't remember MAC addresses, only their modem does and once it forgets, it should give you a new IP when you connect the router again.
Hope this helps!!

Changing MAC address (Ethernet ID)???

I was wondering if anyone knows an easy way to change the MAC address. I've found this suggestion elsewhere:
Open terminal
Type in sudo ifconfig en0 ether aa:bb:cc:dd:ee:ff (new address)
Type in password
When I type in the password it seems that my terminal freezes up. Any ideas of what I'm doing wrong? Are there any programs out there that are easier for this than just using the terminal? Thanks!

You should not change the MAC address. If you mistakenly assign an address that belongs to another device you will no longer be able to use yours. MAC addresses are device unique and there's no reason to change them. Leave well enough alone.

How to change the mac address of thunderbolt to ethernet adapter?

Hello everyone,
I am using Macbook pro retina display 2013 version. I have bought a thunderbolt to ethernet adapter in order to connect my Macbook to LAN. But in my area there is a shared line and I have to clone their mac address to my Macbolok. I could not change the mac address of my thunderbot to ethernet adapter. Can anyone please tell me how to change the mac address of thunderbot to ethernet adapter step by step??
Thanks in advance.

Open terminal and type the followings;
1) sudo ifconfig bridge0 ether xx:xx:xx:xx:xx:xx(it will be your new mac address)
2) Type your password to confirm
3) ifconfig bridge0 |grep ether (to see if change is successful)
PS: *This should with your thunderbolt adapter, but its not working usb to ethernet adapters without installing required drivers.
** You may need to do these steps every time you boot your mac.

Any ways to change the MAC address permanently?

Are there?:)

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)

Able to clone MAC address on Airport Express?

Am I able to clone my MAC address to the airport express router? I connect to wireless and wired networks but my apartment who provides the internet required my MAC address to activate my macbook on the network, so if I can clone my macbook MAC address to the airport express unit then it would work, any advice?

Thank you, I was able to locate the MAC addresses and I will supply my apartment with them. It's just kind of a hassle, I have to fill out another form and wait probably a week for them to add it. With XBOX 360, you can clone your computers MAC address and get access to internet immediately. Thanks for the help...

Blocking all MAC addresses except for the ones you allow

I have a Cisco Aironet 1200 Access Point. I want to block all MAC addresses from accessing the access point, except for the ones I've allowed. First I went to the Address Filters page and clicked on Allowed, then listed all the MAC address I want to be able to access the access point. Then I went to the Ethernet Advanced page, and set the Default Multicast Address Filter to Disallowed, and the Default Unicast Address Filter to Disallowed. Then I went to the AP Radio: Internal Advanced page, clicked on the Advanced Primary SSID Setup link, and set the Default Unicast Address Filter to Disallowed. Accept Authentication Type is set to Open with Shared and Network-EAP cleared, and the Require EAP check boxes are all cleared.
When using a computer whose MAC address is not listed on the Address Filters page, I am still able to connect to the network through the access point. I am also able to connect to the access point from any pc on my network by entering its IP address in Internet Explorer.
What do I need to do to block any pc without a listed MAC address from connecting to the access point?
Thanks, Jeff

Here's the instructions and URL on how to create an MAC based filter:
Follow these steps to create a MAC address filter:
Step 1 Follow the link path to the Address Filters page.
Step 2 Type a destination MAC address in the New MAC Address Filter: Dest
MAC Address field. You can type the address with colons separating the character pairs
(00:40:96:12:34:56, for example) or without any intervening characters (004096123456, for example).
Note If you plan to disallow traffic to all MAC addresses except
those you specify as allowed, put your own MAC address in the list of allowed MAC
addresses. If you plan to disallow multicast traffic, add the broadcast MAC address
(ffffffffffff) to the list of allowed addresses.
Step 3 Click Allowed to pass traffic to the MAC address or click Disallowed
to discard traffic to the MAC address.
Step 4 Click Add. The MAC address appears in the Existing MAC Address
Filters list. To remove the MAC address from the list, select it and click Remove.
Step 5 Click OK. You return automatically to the Setup page.
Step 6 Click Advanced in the AP Radio row of the Network Ports section at
the bottom of the Setup page for the radio you want to configure. The AP Radio Advanced page appears.

Mac Address and Ip

Hello, i was just wondering, is there a way to tell what mac address will be asigned to a specific ip? like what ip goes with which mac address for your isp.

I can try to answer your question even though...it's a bit odd.
1. Every network device has its own MAC address.
2. ISP only cares (usually for residential) about a single MAC address, which is the modem. Pretty much any modem can be access to find it's MAC address.
3. Some IPs, like Comcast, are set to a PCs specific MAC address for connectivity. Meaning, they know your modem, then they'll lock down to your PCs MAC address. You can find that, if Windows, Start > Run >> type cmd, Dos window appears >> type ipconfig/all <-- This will give you MAC address at Physical address (the network card of your PC.
In this manner, the ISP assigns IP address to you (client) via your PCs MAC address. This is what would be known as the WAN side.
It is different on the LAN side. Some modems can act as routers, or a separate router is installed downstream of the modem. The router in this case handles all IP address for all connected network devices. These are termed to be the private network aka LAN (interchangeable terms).
The router is used then to set an IP address to each network device via their MAC address. This is one way to do it.
It's also possible to assign an IP address by telling a PC to USE a specifc IP address.
Hope this helps!

So why does Lenovo put MAC addresses on Box?

What I'd like to know is why Lenovo puts your devices' MAC address on the outside of the box. When I received my Thinkpad W541 over a month ago, I should have made this post then. For security purposes I don't think a MAC address should ever be published on the outside of a box. Just my $0.02
Solved!
Go to Solution.

When you say "box", I assume you're talking about the cardboard box that the computer ships in. The reason the MAC address (and corresponding bar code) is on the outside of this box is for enterprise management purposes. IT admins scan this label to read the MAC address which is used for deployment purposes, such as Microsoft MDT/SCCM. The MAC address may also be used to allow that specific PC onto their corporate network, so the IT admin needs an easy way to get it. When you are talking about an IT admin that deploys thousands of PCs at a time, you can't expect them to open every box and then power on every PC to get to the MAC address which they need before they can do anything else.
From a security perspective, every time you connect to a network, your MAC address is broadcast out to your subnet. In addition to this, MAC addresses are sequential and predictable. For example, the W541 that came out of Lenovo factory before yours, and after yours, you can guess their MAC addresses. So while MAC addresses are unique, there is nothing random or secure about them.

Invalid MAC Address message ?

I'm trying to configure my Verizon firewall, which is MAC address authenticating, to allow a new machine. It's an older Windows Vista machine, and I obtain the MAC via IPCONFIG /ALL. I take the MAC's I see there and try to enter them into the Firewall config section of the router config, and it says "Invalid MAC Address" ? What's going on here?!
BTW, I already have about 8 machines configured and working just fine.
Solved!
Go to Solution.

While I see you solved your issue, there is a (or are) problem(s) to be aware of.
#1 MAC Address(es) are always sent in clear regarless if the type of encryption.
#2 Since it is possible to spoof/clone a MAC Address on a router (for example as shown at http://ui.linksys.com/files/E4200/2.0.25/wanmac.html ) it is also possible to spoof/clone the MAC Address on a computer.
#3 If someone does not know how to spoof/clone the MAC Address on their computer if you do not use wireless encryption (WEP, WPA, WPA2) to protect your wireless network, that someone can still see your traffic.
If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.

Got a new mac today, I created my iCloud account (and therfore my Apple ID?) I tried to set up my iTunes and download updates, and it says i need to review my account, then I had to edit my Apple ID details, but said my email address was invalid???

Got a new mac today, I created my iCloud account (and therfore my Apple ID?) I tried to set up my iTunes and download updates, and it says i need to review my account, then I had to edit my Apple ID details, but said my email address was invalid???

From the information that you have provided, it sounds like your Apple ID has been disabled. You can read this to see how you can troubleshoot that issue.
Apple ID is Disabled - Apple Club - Google Sites
You can try signing out of your ID on the iPad and sign in with his ID and see if that works.
Settings>iTunes and App Stores>Apple ID. Tap your ID and sign out. Then sign in with your husband's newly created ID.

How to get MAC address from client machine ?

Hi dear,
We are implementing security measures for a banking system, so it is required that we track the MAC address of the registered clients along with other parameters. How do we get the MAC address from client machine using ADF or running scripts in client side?
thanks all

Hi,
Welcome to OTN.
Your question has nothing to do with ADF as such. Googling would give you plenty of such topics.
-Arun

Controller detected its ip address by machine with MAC Address

Hi
I am getting error "Controller detected its ip address x.x.x.x using my machine with MAC address xx:xx:xx:xx:xx:xx"when i upgrade my Cisco Wireless Controller 5508 from 7.0.116.0 to 7.4.110.0. Any suggestion
Regards

Hi Mohammed,
If you have more then one controller ??
Could be:
1.Error suggest that it hase detected a duplicate address(its managemnet IP address fo WLC) is in used by a client with the mac address xx:xx:xx:xx:xx:xx.
Please chekc the management interface IP on each controller.
2. Looks like u enabled LAG on controller ?
Means you have connected more then one port from your controller to different switches.
regards

Device in the data base getting PXE aborted --unable to find machine using Mac address /resouce iD

hi
when I deploy osd to my unknown collection iam getting PXE aborted ..earlier we used to delete machines from sccm
by searching query based on Mac address .and clear last pxe advertisement option , but iam finding certain machines getting PXE aborted shows device in data base when we search these machines using mac address /resouce iD unable to find in sccm or
sccm data base . I have found some blogs where unknown collection parameters are changed to decommissioned value from "o" to "1"
but unable to build new unknown collection , its very difficult to delete machines from SCCM console every time when pxe aborted . machines are getting pxe aborted some way its known to SCCM ,its difficult to import machines every time before machines are
image .is there any permanent solution to override pxe aborted ,even systems are known to SCCM ,we are in sccm 2012 infrastructure
hoping a positive replay from all technical leads
thanks in advance
ankith

Hi,
"is there any permanent solution to override pxe aborted ,even systems are known to SCCM ,we are in sccm 2012 infrastructure"
I think there is not a permanent solution.
It could help if you first run the configuration manager report to locate a particular MAC address.
Best Regards,
Joyce
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"Your Machine MAC Address is Invalid"?

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