Tutorial: Enable DCO for a Windows Connector⁠

OpenVPN Data Channel Offload (DCO) improves the OpenVPN tunnel's performance by moving data packet processing from the OpenVPN userspace program to the kernel. On Windows, you can turn on DCO either from within the OpenVPN Connect app or by running commands with the ovpnconnector.exe service binary.

Option 1: Enable DCO in the OpenVPN Connect app⁠

  1. Launch OpenVPN Connect.

  2. Click Menu > Settings

  3. Expand Advanced Settings.

  4. Set Security Level to Preferred.

  5. Click the Enable DCO checkbox.

    Screenshot of OpenVPN Connect 3.5.0⁠
    Screenshot of OpenVPN Connect 3.5.0
  6. Return to the profiles screen and click or tap your profile to connect.

Option 2: Enable DCO using ovpnconnector.exe (command line)⁠

You can also turn on DCO when connecting to CloudConnexa using OpenVPN Connect's ovpnconnector.exe from the command line.

  1. Import and configure the OVPn profile with the following commands:

    cd %ProgramFiles%\OpenVPN Connect
    ovpnconnector.exe install
    ovpnconnector.exe set-config Profile ovpnconnector.ovpn
    ovpnconnector.exe set-config log ovpnconnector.log
    ovpnconnector.exe start

    For a helpful CloudConnexa tutorial, refer to Tutorial: Use OpenVPN Service Binary on Windows to Automatically Connect to CloudConnexa on Startup for more information on using ovpnconnector.exe.

  2. Apply DCO to the active profile:

    cd %ProgramFiles%\OpenVPN Connect
    ovpnconnector.exe stop
    ovpnconnector.exe set-config dco true
    ovpnconnector.exe start
  3. Verify that DCO is active in the OpenVPN Connect log file or the ovpnconnector.log file:

    Connect dco enabledovpnconnector log file
Can't find what you're looking for?

Our support team will be happy to assist you.