Two-Factor Authentication: Difference between revisions

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= Introduction  =
For a general overview of Two Factor authentication in PVE see the [[User Management#_two factor authentication|corresponding User Management section]].
Two-factor authentication adds an additional layer of security by introducing a second step to your login to the Proxmox VE web interface. Additionally to the existing username/password, a one-time password (OTP) is used.


Proxmox VE 3.3 (currently beta) offers two different methods:
For a complete step-by-step guide to setup OATH OTP two-factor authentication (2FA) see [https://pve.proxmox.com/pve-docs/pve-admin-guide.html#pveum_tfa_auth Two Factor Authentication section of our Documentation].
*Time Based One-Time Passwords
*YubiKey


=Time Based One-Time Passwords=
For a demonstration setup for Yubico OTP see [[YubiKey|the YubiKey article]].
[[Image:Screen-Prepare-Realm-for-OATH.png|thumb]] [[Image:Screen-OATH-UserConfig.png|thumb]] [[Image:Screen-OATH-User-Login.png|thumb]]
[[Category:HOWTO]]
 
==Configuration==
Using a time based one-time passwords requires just downloading an OATH application onto your smartphone or tablet - e.g. [https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2 Google Authenticator] for Android - No extra hardware and no internet connection.
 
Two-factor authentication can be enabled on any authentication realm. In this howto I describe the steps for the realm "Proxmox VE authentication server". As soon as you enabled OATH for a authentication realm, only users with a configured secret can login. Make sure that you are logged in as root for this configuration changes.
 
1. Enable TFA (OATH) on the authentication realm.
 
2. Add a unique secret (password) to each user - this secret has to also added to your OATH app on the smartphone of each user. To generate a secret, you can run the following command on your Proxmox VE host: 'oathkeygen'
If a user have more keys, just add all your key ids separated with a space.
 
3. Install the OATH app on your smartphone, add a new account and add the secret from above.
 
In order to test, just open use another browser. I used Firefox doing the configuration with root@pam, so I test the TFA login with Chrome.
*Select the Authentication Realm
*Enter username and password
*Start the app on your smartphone and add the displayed code into the OTP field. Each code is valid for 30 seconds. In order to get you more time for entering and also a protection against small time differences between your Proxmox VE host and your smartphone, we added a 30 seconds grace period (before and after)
 
=YubiKey=
 
[[Image:Screen-Prepare-Realm-for-Yubico.png|thumb]] [[Image:Screen-Yubico-UserConfig.png|thumb]] [[Image:Screen-Yubico-User-Login.png|thumb]]
 
YubiKey creates a one time password stored within a USB drive that acts as a keyboard to your computer. These are physical devices that need to be purchased from Yubico directly, see http://www.yubico.com/
 
In order to login with YubiKey, you need:
*the YubiKey (USB device)
*internet connection
 
==Configuration==
As soon as you got your YubiKey, you can immediately start using it. Two-factor authentication can be enabled on any authentication realm. In this howto I describe the steps for the realm "Proxmox VE authentication server". As soon as you enabled YubiKey for a authentication realm, only users with a YubiKey can login. Make sure that you are logged in as root for this configuration changes.
 
1. Enable TFA (Yubico) on the authentication realm and add the Yubico API key (you can get the API key from www.yubico.com). A valid API key allows the access and use of the Yubico Servers. This has to be done only once per realm.
 
2. Add the Yubikey ID to each user. In order to get the key id from the USB device, just plugin the Yubikey and press the button on the key. The first 12 characters represents the key id (just delete the rest). Repeat this step for all user of this realm. Of course, each user needs a separte key. If a user have more keys, just add all your key ids separated with a space.
 
In order to test, just open use another browser. I used Firefox doing the configuration with root@pam, so I test the TFA login with Chrome.
*Select the Authentication Realm
*Enter username and password
*Click into the OTA field and press the button on your Yubikey
 
= Video Tutorials  =
tbd: [http://www.youtube.com/user/ProxmoxVE Proxmox VE Youtube channel]
 
= Troubleshooting  =
 
[[Category:HOWTO]] [[Category:Technology]]

Latest revision as of 07:11, 21 August 2019

For a general overview of Two Factor authentication in PVE see the corresponding User Management section.

For a complete step-by-step guide to setup OATH OTP two-factor authentication (2FA) see Two Factor Authentication section of our Documentation.

For a demonstration setup for Yubico OTP see the YubiKey article.

Retrieved from "https://pve.proxmox.com/mediawiki/index.php?title=Two-Factor_Authentication&oldid=10495"