WordPress Two Factor Authentication (CMAUTH) - 2FA Methods - SMS
SMS
Authentication Methods
Overview | Google Authenticator | Email Code | Email Link | Mobile Phone SMS
To enable SMS verification in the WordPress Two Factor Authentication plugin, navigate to Admin Dashboard → CM Secure Login Pro → SMS tab.
Confirmation Settings
Lets you limit the frequency of text messages, so as not to disturb users. The field accepts values in minutes, so, by inserting 2, for example, users will receive a maximum of one message every 2 minutes. Inserting different characters, like "4.2" or alphabetic characters, will result in an error. Entering "0" or a negative value will cause the SMS to fail to send.
Amazon Web Service API
Here, you must insert the Amazon SNS API Key and secret. Amazon has a guide on how to obtain these, or you can check it in our guide: General Support - Enabling SMS Messages (Amazon SNS API)
You can also test the service by adding a test number, starting with the country code. For example +1xxxxxxxxx for a US number.
Message
These fields allow you to customize the SMS the users will receive: both the sender name and the message itself can be personalised. The shortcode [code] is essential, as it will contain the verification key the user will have to input to sign in.
Tip: Writing a shortcode between brackets returns its value inside them. For instance, if the blog name is "Writing 101", inserting [[blogname]] will return [Writing 101].
Email Template
You can edit the template for the message the user will receive when he/she tries to login without having registered a telephone number. There are two fields: subject and the message body.
Other Methods
You can learn more about the other methods by reading this guide.
Read important note about AWS Sandbox
AWS Sandbox send SMS only on verified mobile numbers. You can read more here.
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