Public bug reported:

We are using a standard https://openvpn.net/ community server, with
2-factor authentication via Google Authenticator enabled

This has worked with latest version of openvpn in 14.04 (all through
only via the terminal)

When doing a fresh install of 16.04, and initiating the vpn from the
terminal with: openvpnvpn client-config.ovpn it ends with this error:

Fri Apr 29 10:12:27 2016 SENT CONTROL [OpenVPN Server]: 'PUSH_REQUEST' 
(status=1)
Fri Apr 29 10:12:27 2016 AUTH: Received control message: AUTH_FAILED,Google 
Authenticator Code must be a number
Fri Apr 29 10:12:27 2016 SIGTERM[soft,auth-failure] received, process exiting

We have noticed that the user/password + google authenticator dialog has
changed from the old one

Enter Auth Username: ****
Enter Auth Password: ****************
CHALLENGE: Enter Google Authenticator Code
Response: ******

All info is now hidden with asterisks, where only the password was in
the old version

We suspect something wrongly happens when parsing the google-
authenticator response

Thank you

** Affects: openvpn (Ubuntu)
     Importance: Undecided
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1576588

Title:
  google-authenticator with openvpn fails on 16.04

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