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My VPN connection is slow and I am experiencing severe latency

Set the MTU for VPN connections to 1280 bytes.

Written by Jakub Kubinski

Environment

  • OpenVPN

  • Wireguard VPN

  • External platform:

    • VNC Viewer

    • TeamWiever

Issue

  • My VPN connection is slow and I am experiencing severe latency.

  • I am having trouble with remote video troubleshooting over VPN using VNC Viewer.

Solution

Set the MTU (Maximum Transmission Unit) on your VPN client to 1280 bytes.

Cause

Generally speaking, the max allowed MTU size on the Onomondo network is 1360 bytes (due to internal encapsulation overhead). However, in the case of VPN connections, there are some additional headers added to the packets, and if the packets are too large - they get fragmented along the way. This could be the cause behind stuttering and latency.

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