Proton VPN employs two sets of credentials, your Proton account credentials, used to log in on our homepage (or to your email if you are a Proton Mail user), and your OpenVPN credentials, which are used to authenticate with the VPN servers if you are using a 3rd party OpenVPN application.įor security reasons, you must use your OpenVPN credentials and not your Proton credentials when logging in via third party VPN applications. Make sure you are using your OpenVPN credentials ( and not your Proton credentials). Verify that you’re using correct OpenVPN credentials Please try the following steps to fix the problem:ġ. If you encounter this error, there are a number of things you can try to remedy this situation. Quick steps to fix an Authentication Failure error

For more details, check out the different Proton VPN Plans. Free users get 1 connection, while Proton Plus users get up to ten connections. Different plans have different maximum number of simultaneous sessions. You have hit your maximum number of concurrent sessions.The credentials are incorrect, caused for example by using the wrong set of credentials, a typo when entering your username and password, a recent password change or.This error message is thrown by the OpenVPN protocol and can mean one of two things:

Auth Failed on Linux – Ubuntu command line

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