Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

95 posts

Master Geek

Topic # 23588 3-Jul-2008 15:55
Send private message

Any ideas on how to manually change MAC address on LAN port without buying software??

Create new topic
637 posts

Ultimate Geek
+1 received by user: 2


  Reply # 142590 3-Jul-2008 16:05
Send private message

What NIC? What OS?

Most NICs support software MAC changes (bear in mind the burned in address in the PHY won't actually change, but the NIC will use the new software-supplied MAC).

In Windows, you can generally do this through Control Panel -> Networking -> LAN -> Configure -> Advanced -> and look for "Locally Administered Address" or "Hardware address", but it could have other parameters depending on the NIC/driver type.

Under Unix-type machines, ifconfig <dev> hw <new mac> should work; or you can use ethtool.

Why do you want to do this?

95 posts

Master Geek

Reply # 142608 3-Jul-2008 16:33
Send private message

we have cloned machines which we run on a VPN network and using GHOST to clone, it copies all hardware MAC #'s, so having compatability issues when clients are all loggin on using same LAN MAC addresses... when one logs on the other gets booted...

Running XP SP2


Hawkes Bay
8477 posts

Uber Geek
+1 received by user: 4

Mod Emeritus
Lifetime subscriber

  Reply # 142617 3-Jul-2008 16:48
Send private message

Havent thought this right through sorry, as I don't usually have issues with MAC addresses, but..... what about uninstalling/reinstalling the NIC on each client?

Visit for New Zealand based Hosted Exchange, Virtual Servers, Web Hosting, FTP Backup & more.
(1GB free FTP storage, or larger plans from $5.75)
 - Setup your own mailserver at home on Ubuntu Server - full step by step howto here.
 - Have you seen this: Nathan "KFC4LIFE" Dunn.

95 posts

Master Geek

  Reply # 142629 3-Jul-2008 17:09
Send private message

have tried but to no avail... although... i must add... have been playing around with settings etc on a new box that we are only trialling (ASUS PX-20) which doesnt have a default network adapter since i cloned over the top with uncompatable drivers etc... they are running thin client versions of windows on site PC's so don't have the option of changing settings manually through hardware managment...

637 posts

Ultimate Geek
+1 received by user: 2


  Reply # 142649 3-Jul-2008 18:03
Send private message

Windows should always use the HW address of the NIC in the machine by default - you have to go out of your way to tell it NOT to use the BIA.  I don't think that it's likely to inherit it via Ghost, but I could be wrong as I don't know a lot about Windows or Ghost.

What do you mean by "VPN network [...] one logs on and the other gets booted"?  MAC addresses are only relevant to the local L2 segment, generally not to VPNs.

95 posts

Master Geek

Reply # 142814 4-Jul-2008 08:07
Send private message

GHOST does an exact replica of the PC you source from- entire registry and all... not like IMAGE-X which only copies everything under the HAL... When i do my ipconfig on my server the sites that are dropping away and popping up (rotating) are not working because the Network cards say they are the same thing, but with 2 IP address coming from it... The VPN program we use is very basic and doesnt seem to like the fact that the MAC addresses are the same... Beats me!! its all good though... am just going to use SMAC and re-config them all manually...  

95 posts

Master Geek

  Reply # 142817 4-Jul-2008 08:10
Send private message

It could have only been one of a few things anyway... IP address... Computer name (or another computer name on client network clashing with ours) or something to do with the HAL... in this case the only common factor between the PC's that is being seen by my server is the MAC address on the network card...

637 posts

Ultimate Geek
+1 received by user: 2


  Reply # 143086 4-Jul-2008 21:25
Send private message

Well, I guess you've found your solution.  I am still curious about the problem though:

1) I'm not a Windows or Ghost expert, but it seems odd to me that the MAC would be persistent in Windows.  Surely it is dependent on when the machine boots?  All our corporate PCs are built from a single build image, and we don't have duplicate MACs (NB: I don't work for IT, so I'm not sure how the image process works).

It just seems *odd* that the MAC would be stored anywhere in Windows if you hadn't specifically configured it.

What does an "ipconfig /all" show under "Physical Address" for the Ethernet card, on two separate PCs?

2) You state your VPN server sees their MAC address.  If they're connecting over a VPN, then I'm not sure how you would see the MAC, except perhaps for PPPoE.  Any MAC related issues would be on seen on the local LAN the machines are physically connected to; not via a VPN.

181 posts

Master Geek

  Reply # 145074 8-Jul-2008 21:59
Send private message

Are you using SYSPREP at all in your ghosting process?

Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

Stuff Pix enters streaming video market
Posted 21-Mar-2018 09:18

Windows no longer Microsoft’s main focus
Posted 13-Mar-2018 07:47

Why phone makers are obsessed with cameras
Posted 11-Mar-2018 12:25

New Zealand Adopts International Open Data Charter
Posted 3-Mar-2018 12:48

Shipments tumble as NZ phone upgrades slow
Posted 2-Mar-2018 11:48

Oppo R11s: high-end Android, budget price
Posted 27-Feb-2018 16:27

Samsung New Zealand introducing the Galaxy S9 and S9+
Posted 26-Feb-2018 07:00

Fujifilm X beats its best with new top of the range, high-performance camera
Posted 24-Feb-2018 14:05

One million kiwis affected by cybercrime
Posted 24-Feb-2018 13:58

New Zealanders want to engage with government online and via mobile apps
Posted 24-Feb-2018 13:56

Samsung launches Samsung Max
Posted 24-Feb-2018 13:52

CPTPP text and National Interest Analysis released for public scrutiny
Posted 21-Feb-2018 19:43

Foodstuffs to trial digitised shopping trolleys
Posted 21-Feb-2018 18:27

2018: The year of zero-login, smart cars & the biometrics of things
Posted 21-Feb-2018 18:25

Intel reimagines data centre storage with new 3D NAND SSDs
Posted 16-Feb-2018 15:21

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.