Adjusting NordVPN MTU Size Across Platforms (Windows, Linux, Mac)

Diving into the world of VPNs can sometimes feel like you’ve opened a toolbox filled with terms and settings that might seem complex. One such term is “MTU Size.” Let’s break this down and explore how to adjust it for NordVPN across various platforms.

Understanding MTU Size: A Simple Analogy

Imagine you’re sending letters to a friend. Instead of sending one big package, you decide to send several smaller envelopes. The MTU (Maximum Transmission Unit) is like the size limit of each envelope. If your letter (data) is too big for one envelope (packet), it gets split and sent in multiple envelopes.

In the digital realm, if the MTU is set too high, your “envelopes” might not get through because they’re too big. If set too low, you’re sending many tiny envelopes, which isn’t efficient. Finding the right MTU size ensures your data is sent efficiently and without errors.

NordLynx and MTU Size

NordLynx, a protocol developed by NordVPN, is based on WireGuard, known for its speed and security. WireGuard, and by extension NordLynx, typically uses an MTU of 1420 bytes. This value is optimized for most users, but in some cases, adjustments might be needed.

Changing MTU Size for NordVPN


  1. Open Command Prompt as Administrator:
    • Search for “cmd” in the Start menu, right-click on “Command Prompt,” and select “Run as administrator.”
  2. Identify the NordVPN TAP Adapter:
    • Enter the command: netsh interface ipv4 show subinterfaces
    • Look for the “NordVPN TAP Adapter” or similar.
  3. Adjust the MTU Size:
    • Enter the command: netsh interface ipv4 set subinterface "NordVPN TAP Adapter" mtu=XXXX store=persistent
    • Replace “XXXX” with the desired MTU value, e.g., 1400.


  1. Open Terminal.
  2. Identify the NordVPN Network Interface:
    • Enter the command: ip link
    • Look for “nordlynx” or a similar NordVPN-related entry.
  3. Adjust the MTU Size:
    • Enter the command: sudo ip link set dev nordlynx mtu XXXX
    • Replace “XXXX” with the desired MTU value.


  1. Open Terminal (found in Applications > Utilities).
  2. Identify the NordVPN Network Interface:
    • Enter the command: ifconfig
    • Look for an entry related to NordVPN or NordLynx.
  3. Adjust the MTU Size:
    • Enter the command: sudo ifconfig [interface_name] mtu XXXX
    • Replace “[interface_name]” with the NordVPN interface name and “XXXX” with the desired MTU value.

Android & iPhone:

For mobile devices, adjusting the MTU size can be more complex and might require rooted or jailbroken devices. However, NordVPN’s app optimizes the MTU size for mobile networks, so manual adjustments are rarely needed. If you believe you need to adjust the MTU size on a mobile device, it’s recommended to contact NordVPN support or consult specialized forums.

Resources and Further Reading:

  • NordVPN’s official documentation and support pages provide a wealth of information on various settings and configurations: NordVPN Support
  • WireGuard’s official documentation offers insights into the protocol’s inner workings, including MTU settings: WireGuard Documentation


Adjusting the MTU size, while sounding technical, is akin to finding the right envelope size for your letters. With the steps outlined above, you’re well-equipped to make these adjustments for NordVPN across different platforms. Remember, the digital world might seem complex, but with the right tools and knowledge, it becomes a playground of possibilities.

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