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====== Finding the MAC Address of Your Network Adapter ======

In the following, we will describe how to determine the MAC address of a network adapter in the different operating systems. This MAC address is required for registering a computer with CSN.

<note tip>The so-called media access control address (MAC address) is the hardware address of a network adapter. It is used to uniquely identify a device in a computer network. In the different operating systems it is known under different names: "physical address" (Microsoft), "Ethernet-ID", "Airport-ID" or "Wi-Fi address" (Apple) and often "hardware address" (Linux).</note>

===== Windows Vista/7/8/10 =====

{{page>:en:warnung_alte_os&nofooter}}

  - Press {{:windows_key.png?nolink&}}+<key>R</key> on your keyboard.
  - Type ''cmd'' and press ENTER (<key>↵</key>).
  - Type ''ipconfig -all'' in the command prompt and press ENTER (<key>↵</key>) to get a list of all available network adapters.
  - Now choose the MAC address of the correct adapter. Typically, wired network adapters are labeled //Ethernet adapter Local Area Connection//.

{{ :en:anleitung:windows-macaddr-eng.png? | Finding the MAC address in Windows NT/2000/XP/Vista/7/8}}

<note important>Even if you might see numerous network adapters in this list, please do not choose **just any** MAC address but pay attention to choose the correct adapter! Otherwise your connection will not work.</note>

**[[:en:anleitung:anmeldung|► Continue to “Registering with CSN”]]**

===== Linux =====

<note>Here, the procedure in Ubuntu, a Debian-based Linux system, is shown. In other distributions the procedure might vary.</note>

  - Open a new terminal window (e.g. by pressing <key>CTRL</key>, <key>ALT</key> and <key>T</key> in Ubuntu)
  - Type ''ip -brief link show'' in the terminal and press ENTER (<key>↵</key>). All available network adapters will be shown.
  - Now choose the MAC address of the correct adapter. Typically, the first wired network adapter is labeled //eth0//, but names beginning in //ens// or //enp// aren't unusual either.

{{ :anleitung:ubuntu-macaddr-new.jpg? | Finding the MAC address in Ubuntu}}

**[[:en:anleitung:anmeldung|► Continue to “Registering with CSN”]]**

===== Mac OS X =====

  - Open System Preferences from the Apple Menu
  - Click on Network
  - Select the connection you are using (Ethernet)
  - Navigate to the Hardware tab to see the address

**[[:en:anleitung:anmeldung|► Continue to “Registering with CSN”]]**