Tuesday, May 31, 2011

TMAC In Top 10 Networking Software on CNET Download.com

Technitium MAC Address Changer (TMAC) is on Top 10 Networking Software list and on Top 5 Network Tools list on CNET Download.com consistently since quite some time now!

Top 10 Networking Software on CNET Download.com
TMAC Quick Specs on CNET Download.com

Checkout the TMAC listing on CNET Download.com for download and info.

TMAC For Linux by Sagar Belure

If you happen to be on a Linux box and want to change MAC address with ease then you must try TMAC for Linux by Sagar Belure.

Well, I know you can always use ifconfig but, isnt a good bash script to do much of the work for you cool?!

Sorry, We Dont Accept Donations Anymore

We have stopped accepting donations from a few months now for certain reasons and might not be accept in future. We really appreciate your willingness to contribute towards Technitium MAC Address Changer.

Monday, May 30, 2011

TMAC Issue With Wireless Network & Workaround

Technitium MAC Address Changer (TMAC) is unable to change MAC address of many wireless network adapters on Windows Vista and above. Its been observed, and I had quite a few email feedback confirming that, on the same hardware with Windows XP installed, everything seems to work fine!

I also had one email feedback saying that TMAC couldn't change MAC address of Wifi on Windows XP machine after updating drivers. Reverting back to old drivers again made things work.

This issue is observed only on wifi adapters, while you can change the MAC address on Ethernet adapters without any fuss. This tells that the network adapter drivers are actually preventing users from changing MAC address.

A simple workaround would let you change MAC address on most wifi adapters if you want to just make sure your original MAC address is not exposed. You just have to set the first octet of MAC address to "02", instead on what normally is "00".

If the MAC address didnt change, try to disable and re-enable the Wifi network adapter manually from Network and Sharing Center > Change adapter settings (or you can just enter Network Connections in Windows Explorer location bar).

While I am not very sure why it works with "02" I think it has to do with the MAC Address specification which uses first octet to set flags (see image below; courtesy Wikipedia.org)

Setting first octet "02" actually sets the b2 bit indicating that the MAC address is locally administered. Looking at this MAC address thus indicates that the MAC address is changed by local machine administrator. But, its still good if you just want to hide your original MAC address instead of spoofing someone's MAC address.

Another guess on why this works may be due to Windows Network Bridge feature. When you bridge 2 or more network adapters in Windows, the Network Bridge sets its MAC address to the first network adapter added to it with the first octet set to "02". Thus, if the network adapter drivers didn't allow the change, it would make the feature not work.

Just try the workaround if you have this issue.

Update: Posting comments for this post has been disabled since most queries are repeating. Readers are encouraged to read existing comments. You may email queries if your problem is not discussed in the comments.

Technitium Blog!

Finally, after a long time, we have decided to put the official blog for Technitium. We will be posting all useful stuff related to Technitium Software which would be helpful to all you users world wide and would provide basic technical support for stuff and giving feedback/comments.

It would be recommend for you to check out the blog for common queries before you email us for support. Note that we would reply to all email queries we get.

I would personally like to give special thanks to Siddhant Tripathi who provided Technitium with the blog he had registered with his blogger account.

You can also follow @technitium on twitter.