Fedora Networking :: How To Change The Mac Address

Feb 17, 2009

Some people may need to change the mac address of their ethernet network cards. This can be easily done with fedora with command line. Just follow the steps below:

1. Log as root on a textual console (ctrl+F2) or through "su -" command in your console

2. Print your network configuration with ifconfig

[root@localhost ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:23:8B:6A:7E:9E
inet addr:10.1.128.244 Bcast:10.1.255.255 Mask:255.255.0.0
inet6 addr: fe80::218:8bff:fedb:7e9e/64 Scope:Link

[code].....

Here, eth0 is the ethernet interface of your system. The mac address is put in red.

3. Change your mac address using the following syntax

ifconfig eth0 hw ether 00:18:8BA:7E:90

The new value (in green) must be hexadecimal

4. if you have a dhcp server that distributes the adresses automatically, then request a new adress for your eth0 interface

[root@localhost ~]# dhclient eth0

5. Now, your interface is up and have a new mac and IP addresses. This feature may be useful if the network administrator ban you according to the mac adress, for example .........

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I've just reinstalled F14 with KDE rather than Gnome and I'm finding that I'm unable to assign a static IP address to my wired connection.

KDE automatically connects via DHCP, but when I go into KDE's network manager, the eth0 connection isn't listed. In fact, no wired connection is listed. If I manually add one with the correct settings (including a static IP), it switches back to DHCP upon rebooting.

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My laptop has an internal Broadcom wireless adaptor. It works fine for basic Internet access, but I cannot change the MAC address with ifconfig. I would like to be able to change my MAC address. Since this is a laptop, the only option for me to do this is a USB wireless adaptor. But compatibility is very hit-or-miss. I've already tried two USB adaptors that had been stated to be compatible with Linux, and while both worked for basic functionality, neither allowed me to change the MAC address.

For whatever reason, this information seems very, very difficult to find. I have spent upwards of ten hours cumulatively searching forums (including this one) and other resources, and have found only vague, outdated, or outright false information regarding USB adaptors that support this. I believe I will be doing a great service to other users like myself by getting this question directly and conclusively answered for once, and the more responses, the better.

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If so, what is the specific brand and model number, and what steps were necessary to install the drivers?

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when I do "route -n", I got:

Code:

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Code:

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Here's the script:

Code:

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