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Video: Introduction to OpenVPN Data Channel Offload


Explore OpenVPN Data Channel Offload (DCO) in this video — this feature makes the kernel module responsible for managing the data channel.

This video shows how OpenVPN Data Channel Offload (DCO) significantly enhances performance by eliminating the delays and costs associated with transferring payloads between user and kernel space.

Date published:

Aug 31, 2023

Functionality covered:

OpenVPN DCO's use of the kernel module for the OpenVPN data channel.


  • Overview of the Linux kernel and user spaces.

  • Overview of the control channel and data channel.

  • DCO moves data channel handling to kernel space.

Access Server version

2.12 and newer