Two factor authentication for wordpress to authenticate against LinOTP. Installation

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Two factor authentication for wordpress to authenticate against LinOTP.
Installation
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For installing the wordpress plugin copy the file wp-linotp-auth.php to the wordpress directory
./wp-content/plugins
Configuration
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Please add at least a Hostname or IP address of your LinOTP server. 
If you do not want to verify the SSL certificate of the LinOTP server, enter “0” at the verification configuration.
Please note: You need to have the same users in the LinOTP server. 
You can achieve this by configuring an SQL Resolver!
Troubleshooting
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If you misconfigured the plugin, you can not access your wordpress anymore.
You could either:
adapt the entry in the table wp_options where option_name=”active_plugins”;
or you can:
remove the function wp_authenticate from wp-linotp-auth.php
or you can uncomment this line:
// return new WP_User($username);
But be aware: This gives access to any user with any password!

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