What is Sentry?
The Sentry Two-Factor Authentication module is a free, open source extension for the Magento eCommerce platform. When activated, the extension will require two-factor authentication for all administrative users. This greatly enhances security by protecting against compromised user passwords, which represent the most common type of online security breach.
Compatible with Google Authenticator and Duo Security (Available on Android, iOS, Windows Phone and Blackberry)
Easy installation and administration
Created and actively maintained in partnership between Human Element and Nexcess.net
Extensive logging to help fulfill PCI requirements
Once downloaded, install the extension on your Magento site with the Direct File Upload option in your system’s Magento Connect Manager. It is recommended to disable the Magento compiler before installation. Should you wish to use modman, a modman configuration file is included.
Attention: If you see a 404 error when trying to access the Sentry administrator control panel, try logging out and then back into your administrator account.