Failed To Change Mac Address For Wireless Network Connection Set The First Octet Work -

00:11:22:33:44:55 First octet: 00 (binary 00000000 ) → Bit 2 = 0 → Global, invalid → Error: "failed to change mac address – set the first octet"

Here is an explanation of why this happens and how to fix it. The Problem: The Multicast/Unicast Rule

starts with a pair where the second digit is 2, 6, A, or E (for example: 02-XX-XX... , 06-XX-XX... , 0A-XX-XX... , or 0E-XX-XX... ). Apply the change.

sudo macchanger -r wlan0

For practical use, 02 , 06 , 0A , 12 , 1A , 22 , 2A , 32 , 3A , 42 , 4A , 52 , 5A , 62 , 6A , 72 , 7A , 82 , 8A , 92 , 9A , A2 , AA , B2 , BA , C2 , CA , D2 , DA , E2 , EA , F2 , or FA are easy to remember. For example, changing the first octet to 02 (binary 00000010 – unicast, locally administered) while leaving the remaining five octets as desired will typically succeed on most wireless drivers. Using 0A (binary 00001010 ) also works. Conversely, any attempt to set the first octet to 00 , 01 , 04 , 05 , 08 , 09 , 0C , 0D , etc., will fail.

Click the radio button to activate the empty text field. Step 3: Apply the Rule

What does this mean? And more importantly, ? 00:11:22:33:44:55 First octet: 00 (binary 00000000 ) →

For a spoofed MAC address to be accepted by the wireless card driver, it be a "Locally Administered Address." The "First Octet" Rule

Click the "Value" radio button and type a 12-digit hex string. Ensure the second digit is 2, 6, A, or E .

A MAC address is a 12-digit hexadecimal number typically written as six octets (pairs) separated by colons or hyphens, for example: 2C:54:91:A3:4F:1E . , 0A-XX-XX

: The unique Network Interface Controller (NIC) identifier generated by the factory.

Here is how to fix it.