Icons made by Smashicons and FreePik from Flaticon.How to spoof the MAC address of a network interface on LinuxĪ 48-bit MAC address (e.g., 08:4f:b5:05:56:a0) is a globally unique identifier associated with a physical network interface, which is assigned by a manufacturer of the corresponding network interface card. If you are interested in MAC addresses, you should probably head over to our blog section as we have many other tutorials on the same subject over there. You also learnt about the relationship between your MAC address and the ARP protocol, that is used every single day for private network communication. In this tutorial, you learnt how you can easily find your MAC address on Linux. Great, now you know all the MAC addresses that are cached in your server! Conclusion If you are interested in the MAC addresses currently stored locally on your server, hit the “arp” command in order to see your current cache. However, switches are not the only ones to have an ARP table : your local server does also. Switches will store this information using an ARP table containing a mapping between IP addresses and MAC addresses. Most of the time, this information will be used by switches (which are layer 2 devices) on your network. Now that you have identified your MAC address, you can use this information in order to troubleshoot network issues.Īs a quick reminder, the MAC identifier is used by the ARP protocol in order to establish connections between nodes over a private local network (or LAN network). You can now use our website in order to identify the vendor associated with this MAC address. $ cat /sys/class/net/eth0/addressĬongratulations, you have successfully identified your MAC address on your filesystem. Now that you have identified the network interface you are interested in, open the content of the “address” file in this symbolic link. In order to find your MAC address on Linux, navigate to the "/sys/class/net" and identify the interface card you are interested in. Luckily for you, the MAC address can be accessed that way. Find MAC Address by navigating the filesystemĪs you probably already know, on Linux, everything is a file.Īs a consequence, a lot of information is stored directly in plain files accessible by users on the filesystem. Using OUILookup, you are now able to search for your OUI vendor and have some more information about their location. Using this command, you will be listed with all the network interfaces available on your current server.Īs you can see, the result is pretty much the same than the one from the previous section (3a:2c:fb:46:63:be). In order to get your current MAC address, execute the “ip addr” command with the “show” option. In most cases, it is used in order to determine your current IP address, but it can also be used in order to get your MAC address. If you are a veteran system administrator, you are probably already very familiar with the “ip” command. However, using the “ifconfig” command is not the only way for you to get your MAC address.
You successfully found your MAC address on Linux.
Note : if you are dealing with a virtual machine, or if you are currently renting a VPS, you may be assigned a virtual MAC address that is not linked to a specific vendor.Īlso, if you have multiple network interfaces, they will all display their own individual addresses.
The first three triplets are reserved for the OUI vendor (02:42:35 being the OUI vendor, and 54:98:2a the specific MAC address). In this case, you are interested in the layer 2 information, more precisely the ether MAC address.Īs you can see, when running the “ ifconfig” command, my current MAC address is 02:42:35:54:98:2a.
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