Description
Secure WordPress login with this two factor auth. Users will have to enter an One Time Password when they log in.
Why You Need This
Users can have common or weak passwords that lets hackers/bots brute-force your WordPress site and gain access to your files and place malware there.
Just like happend not that long ago: Article on TechCrunch
If all sites would have used this plugin, this would never happend.
It doesn’t matter how weak your users passwords are, no one can gain access to your WordPress site
without already having access to the users mobile phone or email inbox (depending on how the user gets his OTP).
How Does It Work?
This plugin uses the industry standard algorithm TOTP or HOTP for creating One Time Passwords.
A OTP is valid for a certain time and after that a new code has to be entered.
You can now choose to use third party apps like Google Authenticator which is available for most mobile platforms. You can really use any
third party app that supports TOTP/HOTP that generates 6 digits OTP’s.
Or, as before, you can choose to get your One Time Passwords by email.
Since you have to enter a secret code to third party apps, email is the default way of delivering One Time Passwords. Your
users will have to activate delivery by third party apps themselves.
Easy To Use
Just install this plugin and you’re all set. There’s really nothing more to it.
If you want to use a third party app, goto Two Factor Auth in the admin menu and activate it and set up your app.
General settings can be found uner Settings -> Two Factor Auth in admin menu. Settings for each individual user
can be found at the root level of the admin menu, in Two Factor Auth.
A bit more work to get logged in, but a whole lot more secure!
If you use WooCommerce or other plugins that make custom login forms, you will not be able to login through those anymore.
I will be adding a plugin that puts a One Time Password field to WooCommerce. If you use some other plugin that needs
support for this, let me know in the support forum.
TOTP or HOTP
Which algorithm you and your users choose doesn’t really matter. The time based TOTP is a bit more secure since a One Time
Password is valid only for a certain amount of time. But this requires the server time to be in sync the clients time (if
the OTP isn’t delivered by email). This is often hard to do with embedded clients and the event based HOTP is then a better choice.
If you have a somewhat slow email server and have chosen email delivery, you might not get the TOTP in time.
Conslusion: Choose which ever you want. TOTP is a little bit safer since OTP:s only are valid for a short period.
Note that email delivery users always uses the site default algorithm, which you can set on the settings page. Third party
apps users can choose which one they want.
Is this really Two Factor Auth?
Before version 3.0 this plugin had ‘kind of’ two factor auth where the OTP was delivered to an email address.
Since version 3.0 you can have real two factor auth if you activate the Third Party Apps delivery type.
Read more about what two factor auth means >>.
See https://oskarhane.com/plugin-two-factor-auth-for-wordpress/ for more info.
Screenshots
The admin login page. 
The admin login page when the username and password is entered and an OTP is asked for. 
User settings page where they choose delivery type. 
Admin settings page.
Installation
Easy installation.
This plugin requires PHP version 5.3 or higher and support for PHP mcrypt.
- Upload two-factor-auth.zip through the ‘Plugins’ menu in WordPress
- Activate the plugin through the ‘Plugins’ menu in WordPress
or
- Search for ‘Two Factor Auth’ in the ‘Plugins’ menu in WordPress.
- Click the ‘Install’ button. (Make sure you picks the right one)
- Activate the plugin through the ‘Plugins’ menu in WordPress
FAQ
- Can I have real Two Factor Auth?
-
Yes, since version 3.0 you can activate real Two Factor Auth by activating third party apps option under “Two Factor Auth” in admin menu. Don’t forget to set up your app with the secret key.
- Oops, I lost my phone. What to do?
-
Hopefully you saved the three Panic Codes when you activated third party apps. Use one of them.
- If I can’t reach my email account, can I bypass this plugin and log in anyway?
-
If you have Panic Codes, you can use them. Otherwise, no.
Reviews
Contributors & Developers
“Two Factor Auth” is open source software. The following people have contributed to this plugin.
Contributors
Translate “Two Factor Auth” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
4.4
- Added spanish translation, thanks to Andrew Kurtis at WebHostingHub for that.
- Added settings section to change the OTP email from address and name on admin settings page. Thanks to Denny Cherry at Denny Cherry & Associates Consulting for that.
4.3.5
- Inserting the TFA Form as first element in form. Enables sending the form with return-key in all browsers.
- Updated Tested up to version to 3.9.1
4.3.4
- Removed autocomplete on OTP field. Thanks to https://github.com/edent
4.3.3
- Last release introduced a email login bug that is fixed in this version.
4.3.2
- You can now enter an email address instead of an username to generate an OTP email.
4.3.1
- Successfully tested in WP 3.8
4.3
- All new layout on the login page. Now the OTP field and button won’t be shown until an activated user has entered their login details. Users that belongs to non activated groups will not see any difference from a regular login form.
- Fixed an error where a PHP NOTICE was shown on user settings page when WP_DEBUG was set to true. (thnx Thomas van der Beek)
4.2.4
Just added “Tested up to” tag in readme since it works fine in WP 3.7. Next version with some updates will come soon.
4.2.3
- Just updated the “Tested up to” tag in readme. It works fine.
4.2.2
- XMLRPC users are now availale to post again. Settings for this is in Settings->TFA.
- Added a help text when the OTP-button on ligon page is clicked so people know that the OTP is coming to their email.
4.2.1
- The plugin now checks all login forms, not depending on form field names.
4.2
- Added support for HOTP!
- If HOTP is going close to off sync, the user is noticed.
- Fixed an unclosed <strong> on admin settings page.
- Email delivery users always use the site default algorithm.
4.1.2
- Added German translation (Thanks Michael Schwark)
- Added Chilean Spanish translation (Thanks Michael Schwark)
- Fixed css property bug on OTP button so it looks nice in all browsers.
4.1.1
- Fixed a bug where the button on the lost password page got disabled.
4.1
- Added language/localization support. Please send me your translations .po-files
- get_users needs WP 3.1.0. Changing the requirements for the plugin.
4.0.2
- Added PHP 5.3 check at activation
- Added mcrypt support check at activation
- Removed namespace in the Base32 class for better PHP support.
4.0.1
- Made the button on the login page blue so it’s more clear that it’s a button.
- Fixed some typos.
4.0
- All keys and panic codes are now encrypted in the database, as they should be.
- Panic codes are now based on your key.
- Users find their settings in root level of the admin menu.
- Only user roles with TFA activated see the admin menu item.
- Nicer/cleaner UI for users.
- Upgrade script for older installations. Must be executed by admin right after plugin update. Manually.
- Refactored all code and made it class based.
3.0.4
Fixed a bug where a OTP could be used twice.
3.0.3
- Added limitation to one login per time window (30 seconds).
3.0.2
- Fixed a bug where emails for some installations didn’t work. Thanks to MatÃas at https://www.periodicoellatino.es for the help.
- Change to jQuery for making a POST request because of easier cross browser support.
3.0.1
Fixed so users get alerted of they don’t enter a username before clicking the OTP button on the login page.
3.0
- Added TOTP as the OTP generator. Compatible with Google Authenticator and other third party auth apps.
- Added user settings page where they can activate usage of third party apps instead of email delivery of code.
- Added OTP field to standard login form instead of a middle page.
- Added Panic Codes which users can use if they loose their phone, change email etc.
- Removed second login screen.
- Updated admin settings page. Admins can now change user delivery of codes back to email if users loose their phone etc.
2.1
- Fixed warning message on admin settings page (thanks Joi)
- Hooks into a filter now so other plugins like Better WP Security, Limit Login Attemps etc. get a chance to log a failed login
- Error message are now displayed when the entered code was wrong
- Code length is not fixed any more. It can be 5 or 6 characters. Removed som easy to mix charaters as well (1 and I).
2.0
- Admin settings menu where you can choose which user roles that will have this activated. There will still be a second screen where the not activated user roles enter their password, but the One Time Password field is hidden.
1.1
- Removed password field from regular login page and added it to the second page where the user now enters both the emailed code and the password.
1.0
- Initial release