OpenVPN Support Forum

Hi all,

I'm seeing an error on OpenVPN AS in the logs, for the connection of a client (TPLink ER605).
It was working correctly yesterday, but now the connection is down, an an error message appears in the logs every few minutes, saying "SESSION_ID HMAC token is expired". I've tried searching for this error message online, and I can't find any other mention of it.
Can anyone please shed some light on what the cause is, and a possible fix?

Thanks,

Josh

Hello Josh,

Not sure about a solution. Only that a session token is used instead of complete credentials once you've authenticated a VPN session. That token has expired. But it looks like the client keeps trying endlessly to reuse that token instead of doing authentication again like it should.

You could try to get an autologin type profile from your Access Server and installing that on your TP-Link device. Autologin profiles do not have to use session tokens or credentials, they just authenticate using the client's private key, fully automatically. It is more suited to unattended connections.

Also check if there is a more up-to-date firmware available for your TP-Link device.

Kind regards,
Johan