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Guide: Please read this before posting

Hi there,

Thank you for reaching out to our forum for your needs. Before you start posting a topic in the Report a Problem forum, kindly read through our guidelines:

This forum is not intended to be an official support channel. If you'd prefer a quicker response to any issues you're experiencing, we'd recommend you to contact our customer support team direct by emailing us at or by submitting a ticket.

All of the topics posted here are not officially supported and should only be followed unless you understand the risks involved.

The list below are the most common issues experienced by our users.

Authentication Failed / AUTH_FAILED Error

If you're getting this error on your Windows OpenVPN or Mac TunnelBlick app, it usually means that you've entered your user details incorrectly.

Fix OpenVPN Authentication Failure (Windows)

Fix TunnelBlick Authentication Failure (Mac)

No TAP Adapter Available Error

Fix OpenVPN TAP Adapter Issue (Windows)

Cant find what you're looking for? Check out our Knowledge Base portal for more guides, tips, and help!

Thank you.