Changing MAC address (spoofing)

Hello,
I want to change the MAC address on a Mac Book Pro running OS X Leopard utilizing the command:
+sudo ifconfig en0 lladdra 00:11:22:33:44:55+
Even though the command does not give a warning, nor an error message, the MAC is not changed. In Tiger, it the same command did just fine.
How do I enable MAC address Spoofing on OS X Leo? Is there any parameter to send to the Kernel?
Mh.
For somewhat ever reason, MAC address spoofing for the wireless interface (en1) still seems to work!?
Makes me fell confused:-)
Help strongly appreciated!
Thanks,
Chris

This is how it works on my machine. Note the change of MAC address and because I am using DHCP it changes the IP address also. I have changed the MAC address in this info so as not to use my real one. So I am now running on the new MAC address. It will revert to the original on reboot, you would need a script to change it every time you restart the computer. Not sure why but this does not work on the airport.
This is a nice exercise but why do you would you want to change it?
regards
Last login: Tue Oct 27 13:42:53 on console
Computer-name-iMac:~ username$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1492
inet 192.168.0.2 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1e:c2:aa:bb:06
< cut>
Computer-name-iMac:~ username$ sudo ifconfig en0 lladdr 00:1e:c2:aa:bb:07
Computer-name-iMac:~ username$ sudo ifconfig en0 down
Computer-name-iMac:~ username$ sudo ifconfig en0 up
Computer-name-iMac:~ username$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1492
inet 192.168.0.3 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1e:c2:aa:bb:07
media: 100baseTX <full-duplex,flow-control> status: active
<cut>
Computer-name-iMac:~ username$

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Changing MAC Address

Recently i have been trying to change my Router's MAC Address. I have a WRT54g v.3. I have done it before where i had unplugged the internet cable going from the wall to the modem. I saw the change on the 192.168.1.1 status page. And i noticed with a proxy and the new changed MAC address i was able to get into gaming servers i hadn't been able to before because my IP was banned.
Now when i try to change my MAC address, it doesn't seem to change on the router stautus page like it did once before. I'm sure that it's possible to concel my identity of my old IP and get a new IP (through a proxy), many people do this for security reasons so i'm hoping linksys products can offer some kind of security by doing this.
btw, sorry about the name, if it's possible can it be changed to Joe. Thanks guys.

Your MAC is "stuck" to that router, you need to spoof it. Google it.

I would like to change Mac Address of Ethernet only without card change

I would like to change Mac Address of Ethernet only without ethernet card change.
Please let me know how to change Mac Address.
It's need to keep internet security.

I question why you want/need to also, but it can be easily done...
http://osxdaily.com/2008/01/17/how-to-spoof-your-mac-address-in-mac-os-x/
http://whatismyipaddress.com/change-mac

Can't change MAC address of my wireless card on Windows XP

Dear Forum Members,
I have recently bought a notebook, Lenovo IdeaPad G550L (I haven't found section for the G series here on the forum) and would like to use its WiFi adapter (BCM4310 according to Everest) with explicitly changed MAC address. I installed the recommended driver, available from Lenovo's website, version 5.10.38.14. I tried the common way to change the MAC address, went to Control Panel -> Network Interfaces -> Broadcom Wireless Network Adapter -> Configure... -> Advanced -> Locally administered MAC address, and changed it to a different address (without ":" or any separator characters). Unfortunately this common solution won't work at all. Although, no error messages are produced when changing it (so it seems successful) my wireless router shows me the original MAC address of my integrated wifi card. Tried to restart my computer, my router, everything.
* Tried different drivers, downloaded a driver from HP which had a separate wireless configurator, Broadcom Wireless Utility. It worked like the driver from Lenovo (except this one hasn't got the utility), but I was still unable to change my MAC address.
* Tried a different driver from SoftPedia, version 5.10.79.14 (this is newer than Lenovo's), it didn't work either.
* Tried Nathan True's MACShift utility. It seemed to change the MAC address, but my router showed the original, so it didn't.
* Tried to look for official Broadcom drivers on www.broadcom.com but found nothing for BCM4310.
* Finally, I booted my alternative OS, the latest Ubuntu Linux, and used the kernel driver b43 for my wireless adapter. I tried to change my MAC address using the command ifconfig wlan0 hw ether .... and connected to my network. It worked, my router showed the changed MAC so the hardware (or the firmware) is capable of doing this by the right driver/firmware.
I tried to address Broadcom with the issue, sent them a letter like this post they replied that they are not competent, they wrote the following (I guess this was an automatically generated message because it got back in 10 seconds ) from [email protected]:
"As the chipset supplier, Broadcom provides driver support to our customers - the manufacturers of wireless devices - that ultimately provide products to end customers, such as wireless LAN vendors, cable modem vendors, and notebook providers. It is up to these manufacturers to provide product-specific drivers and software support to their end customers. Please contact the manufacturer of your wireless device for their current drivers"
Then I addressed Lenovo with the problem, their answer:
"Dear ******,
Thank you for contacting Lenovo, the makers of ThinkPad and ThinkCentre products. As I understand, you have purchased a Lenovo IdeaPad G550L and would like to use its WiFi adapter (BCM4310 according to Everest) with explicitly change MAC address.and you would like to know is there an official driver for Windows XP that allows you this basic feature like b43 in Linux. We apologize,Please do speak with our Idea pad technical Team at 877-453-6686 Option 1-2-1-2 for further assistance.
If you have further questions or concerns, please feel free to contact us at 866-42-THINK (84465) option number 2. We will be happy to assist at that time.
Once again, thank you for contacting Lenovo.
Sincerely,
Lenovo Websales/CustServe"
So this means I should call them and spend extra money for phone bill of international calls because of their fault of providing a basic feature that is to be expected from every single wireless card in the market. Should I believe that a guide over the phone is more efficient than a step-by-step solution or a link to an alternative driver? I'm getting kind of disappointed. At least they have understood (or copy-pasted) my problem, dutch comfort though.
Any ideas? Anyone experienced the same problem and solved it? Is there an official (or even unofficial) driver for this device for Windows XP that allows me this basic feature (like b43 in Linux)?
Thanks in advance,
str4ngS

Yes, I have posted this thread to different forums after I realized that Lenovo "customer care" is not likely to help me out and even wirelessforums.org members couldn't come up with any ideas for days, that's why. I have already written that helper applications like SMAC (or etherchange or macshift) don't work, because they do the same thing in the system as I change it in the driver panel, so they use the same method which simply does not work.
Locked? Definitely not. If yes, why can I change the MAC of my adapter under Ubuntu Linux using b43 open-source driver if it's really locked? Or you mean it's locked from software, because Lenovo or Broadcom didn't want their users to change their MACs or they just forgot to release a fully-functional driver? Well, then I would like to have a driver in which it's not locked, because this is a basic feature of my adapter of which the hardware is capable.
I have already contacted Broadcom, see their (automatically-generated) answer in my initial post, but I will try to do that again with more foresight.

How to change mac address on mac

i'm sry i'm not sure if this is the right section or not but yeah.... nyways does anyone know how to change mac address on a macbook?

If you have not updated your OS you can use the following command.
sudo ifconfig enX ether xx:xx:xx:xx:xx:xx
You will need to replace the X with your network number and the xx:xx:xx:xx:xx:xx with the mac you want to have.
Then run
sudo ifconfig enX down
sudo ifconfig enX up
This change will last till your next reboot.
cheers
NOTE: This is not working in 10.5

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Hi there,
How to change mac address on time capsule?

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How to change mac address on wrt54g router

How to change mac address on wrt54g router?

are u sure u wanna change the MAC of the WRT54G ? it's not possible....you can however clone the MAC address of your PC onto the router...depending on your ISP.

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I recently bought an New iMac and Migrated everything over from my old mac.
However I mistakingly migrated the Static IP address or MAC address from the old machine too!
This is now giving me problems when trying to connect both machines to my network via Ethernet!
My wireless access is fine, but ethernet is saying ‘no ethernet cable is inserted’ on both machines now. The cable is in and works fine on other machines.
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Hi
System Preferences > Network > Select the interface > Advanced > TCP/IP. Have a look at both macs to see what they're using. Change one of them.
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Change MAC Address On AirPort Extreme

I'm using the latest Apple AirPort Extreme 802.11n (Apple Part Number MB763AM/A and Model A1301 as noted on the box). I am currently using Firmware 7.5.1. I haven't yet updated to the latest AirPort Base Station Firmware 7.5.2.
Is there a way to change the MAC Address on this device? The reason I ask is because I use cable Internet and releasing and renewing the IP Address on cable never works. You're basically stuck with the same IP address for months on end unless you leave your connection off for at least 72 hours or more (DSL out here works differently - you get a new IP Address immediately after releasing and renewing).
I don't like using the term "spoofing" as it sounds as if you're trying to do something devious (which I'm not) but I just don't like having the same IP Address for months on end since I don't think it's wise for security reasons.
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Is there a way to change the MAC Address on this device?
If you are referring to the MAC address of the AirtPort Extreme, it is not possible to change this.
You're basically stuck with the same IP address for months on end unless you leave your connection off for at least 72 hours or more (DSL out here works differently - you get a new IP Address immediately after releasing and renewing).
The IP address you are referring to here is assigned by your service provider. The AirPort Extreme has no control over this.
I'd be interested in knowing if there is a way to change the MAC Address of my AirPort Extreme, perhaps using a third-party utility of some sort, perhaps through the Terminal or maybe the new firmware update allows you to finally do this?
Sorry, not possible.

Change MAC address on Intel Mac?

Is it possible to change the MAC address of an Apple computer using an Intel chip and if so, how?
Open Firmware on PPC machines made it easy. I don't know about EFI.

kevintii wrote:
Hello Kappy,
Why is it not a good idea to change the MAC address?
Thanks Kevin
Because it is intended to be a globally unique identifier of hardware. The MAC address can be changed on modern systems but why? See here for more info http://en.wikipedia.org/wiki/MAC_address
Here are some reasons a person may want to change their MAC address. None of them sound like legitimately valid reasons.
From http://www.irongeek.com/i.php?page=security/changemac
To get past MAC address filtering on a router. Valid MAC      addresses can be found by sniffing them and then the deviant user could      assume the MAC of a valid host. Having two hosts on the same network can cause some network stability problems,      but much of the time it's workable. This is one of the reasons why MIC      Address filtering on a wireless router is pointless. An attacker can just      sniff the MAC address out of the air while in monitor mode and set his WiFi      NIC to use it. Interestingly, a lot of hotels use MAC filtering in their      "pay to surf" schemes, so this method can be an instant in for cheap skate      road warriors.
Sniffing other connections on the network. By assuming      another host's MAC as their own they may receive packets not meant for them.      However, ARP poisoning is generally a better method than MAC spoofing to      accomplish this task.
So as to keep their burned in MAC address out of IDS and   security logs, thus keeping deviant behavior from being connected to their   hardware. For example, two of the main things a DHCP server logs when it      leases an IP to a client is the MAC address and host name. If you have a      wireless router look around on it's web interface for where it logs this      info. Luckily there are tools to randomize this information (MadMACs).
To pull off a denial of service attack, for instance   assuming the MAC of the gateway to a sub net might cause traffic problems.      Also, a lot of WiFi routers will lock up if a client tries to connect with      the same MAC as the router's BSSID.

Change MAC Address

How do you change the MAC address in Leopard?

I've found that http://spoofmac.com works great in Leopard... for spoofing the AirPort MAC address. Not so much for the ethernet. It seems that something changed in Leopard and I haven't seen any information about spoofing wired MAC addresses and success under Leopard.
(A legitimate reason to spoof a MAC address: I'm trying to get two ports in my apartment swapped from the student subnet to the faculty subnet. The net admin has no idea which cables are involved and wants to trace MAC addresses. I've got a couple of routers plugged into the ports... but no way of getting the routers to go through the web forms to register with our student ResNet and therefore no way to get the routers (and their MAC addresses) out of their ResNet jail, and make them traceable so I can get these ports swapped. So... I'm trying to spoof their MAC addresses on a machine that can go through the web forms to get those MAC addresses out of jail. Unclear if spoofing the MAC addresses on the wireless will suffice. Ay yi yi.)

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.

Need to change mac address for msi 9211

Hello All.
I need to change my msi 9211 server mac address to be same as some other server for some licensing issues, this server doesnt have a floppy so i guess i ll need to boot it via cd or something.
what software is required?
anyone can be help, will be appreciated/rewarded
thanks
pls reply to [email protected]

Hi,
Please contact MSI or Local supplier direct on this issue.
This is an END USER forum run by END USERS, we do not have access to MSI licencing policies..........
Del

How i can change MAC-address of ethernet?

in the tiger i just was typing "sudo ifconfig en0 lladdr (or ether) 00:0c:76:18:25:ac" but in leopard that doesn't work.
Programms like MacDaddy X and ChangeMAC doesn't work too.
I dunno what i must do, please help.
how it works in leopard?
Message was edited by: Flamesix

i'm having the same problem (and because of that i claim Apple did really forgot the 'Computers' part when they changed their name, i had to install Leopard just to see i cant change the mac thus connect to my lan, thus i had to install tiger back, grr)
in another thread i've found this alternative to en0 ether xx:xx... :
sudo ifconfig en0 lladdr 00:00:00:00:00:00
but i remember trying it without success, anyone has a clue how to change the MAC address in leopard? on top of it - why on earth would they downgrade a system? is this one of these 300 new features? sweet :P

Changing MAC address (spoofing)

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