• Overview
• Enabling 2FA
  • One-time password
  • One-time password via FortiAuthenticator
    • Enable FortiAuthenticator integration
  • One-time password via FortiToken Cloud
    • Enable or disable FortiToken Cloud integration
  • U2F device
  • WebAuthn device
• Recovery codes
• Signing in with 2FA Enabled
  • Sign in by using a one-time password
  • Sign in by using a U2F device
  • Sign in by using a WebAuthn device
• Disabling 2FA
• Personal access tokens
• Recovery options
  • Use a saved recovery code
  • Generate new recovery codes using SSH
  • Regenerate 2FA recovery codes
  • Ask a GitLab administrator to disable two-factor authentication on your account
• Note to GitLab administrators
• Enable or disable WebAuthn
• Troubleshooting

Two-factor authentication

Two-factor authentication (2FA) provides an additional level of security to your GitLab account. After being enabled, in addition to supplying your username and password to sign in, you are prompted for a code generated by your one-time password authenticator (for example, a password manager on one of your devices).

By enabling 2FA, the only way someone other than you can sign in to your account is to know your username and password and have access to your one-time password secret.

Overview

In addition to time-based one time passwords (TOTP), GitLab supports U2F (universal 2nd factor) and WebAuthn (experimental) devices as the second factor of authentication. After being enabled, in addition to supplying your username and password to sign in, you’re prompted to activate your U2F / WebAuthn device (usually by pressing a button on it) which performs secure authentication on your behalf.

It’s highly recommended that you set up 2FA with both a one-time password authenticator or use FortiAuthenticator and a U2F device or a WebAuthn device, so you can still access your account if you lose your U2F / WebAuthn device.

Enabling 2FA

There are multiple ways to enable two-factor authentication: by using a one-time password authenticator or a U2F / WebAuthn device.

One-time password

To enable 2FA:

1. In GitLab:
   1. Sign in to your GitLab account.
   2. Go to your User settings.
   3. Go to Account.
   4. Select Enable Two-factor Authentication.
2. On your device (usually your phone):
   1. Install a compatible application, like:
      • Authy
      • Duo Mobile
      • LastPass Authenticator
      • Authenticator
      • andOTP
      • Google Authenticator
      • Microsoft Authenticator
      • SailOTP
   2. In the application, add a new entry in one of two ways:
      • Scan the code presented in GitLab with your device’s camera to add the entry automatically.
      • Enter the details provided to add the entry manually.
3. In GitLab:
   1. Enter the six-digit pin number from the entry on your device into the Pin code field.
   2. Select Submit.

If the pin you entered was correct, a message displays indicating that two-factor authentication has been enabled, and you’re shown a list of recovery codes. Be sure to download them and keep them in a safe place.

One-time password via FortiAuthenticator

You can use FortiAuthenticator as an OTP provider in GitLab. Users must exist in both FortiAuthenticator and GitLab with the exact same username, and users must have FortiToken configured in FortiAuthenticator.

You need a username and access token for FortiAuthenticator. The access_token in the code samples shown below is the FortAuthenticator access key. To get the token, see the REST API Solution Guide at Fortinet Document Library. GitLab 13.5 has been tested with FortAuthenticator version 6.2.0.

First configure FortiAuthenticator in GitLab. On your GitLab server:

1. Open the configuration file.

   For Omnibus GitLab:

   sudo editor /etc/gitlab/gitlab.rb
   

   For installations from source:

   cd /home/git/gitlab
   sudo -u git -H editor config/gitlab.yml
   

2. Add the provider configuration:

   For Omnibus package:

   gitlab_rails['forti_authenticator_enabled'] = true
   gitlab_rails['forti_authenticator_host'] = 'forti_authenticator.example.com'
   gitlab_rails['forti_authenticator_port'] = 443
   gitlab_rails['forti_authenticator_username'] = '<some_username>'
   gitlab_rails['forti_authenticator_access_token'] = 's3cr3t'
   

   For installations from source:

   forti_authenticator:
     enabled: true
     host: forti_authenticator.example.com
     port: 443
     username: <some_username>
     access_token: s3cr3t
   

3. Save the configuration file.
4. Reconfigure or restart GitLab for the changes to take effect if you installed GitLab via Omnibus or from source respectively.

Enable FortiAuthenticator integration

This feature comes with the :forti_authenticator feature flag disabled by default.

To enable this feature, ask a GitLab administrator with Rails console access to run the following command:

Feature.enable(:forti_authenticator, User.find(<user ID>))

One-time password via FortiToken Cloud

You can use FortiToken Cloud as an OTP provider in GitLab. Users must exist in both FortiToken Cloud and GitLab with the exact same username, and users must have FortiToken configured in FortiToken Cloud.

You’ll also need a client_id and client_secret to configure FortiToken Cloud. To get these, see the REST API Guide at Fortinet Document Library.

First configure FortiToken Cloud in GitLab. On your GitLab server:

1. Open the configuration file.

   For Omnibus GitLab:

   sudo editor /etc/gitlab/gitlab.rb
   

   For installations from source:

   cd /home/git/gitlab
   sudo -u git -H editor config/gitlab.yml
   

2. Add the provider configuration:

   For Omnibus package:

   gitlab_rails['forti_token_cloud_enabled'] = true
   gitlab_rails['forti_token_cloud_client_id'] = '<your_fortinet_cloud_client_id>'
   gitlab_rails['forti_token_cloud_client_secret'] = '<your_fortinet_cloud_client_secret>'
   

   For installations from source:

   forti_token_cloud:
     enabled: true
     client_id: YOUR_FORTI_TOKEN_CLOUD_CLIENT_ID
     client_secret: YOUR_FORTI_TOKEN_CLOUD_CLIENT_SECRET
   

3. Save the configuration file.
4. Reconfigure or restart GitLab for the changes to take effect if you installed GitLab via Omnibus or from source respectively.

Enable or disable FortiToken Cloud integration

FortiToken Cloud integration is under development and not ready for production use. It is deployed behind a feature flag that is disabled by default. GitLab administrators with access to the GitLab Rails console can enable it.

To enable it:

Feature.enable(:forti_token_cloud, User.find(<user ID>))

To disable it:

Feature.disable(:forti_token_cloud, User.find(<user ID>))

U2F device

GitLab officially only supports YubiKey U2F devices, but users have successfully used SoloKeys or Google Titan Security Key.

The U2F workflow is supported by the following desktop browsers:

• Chrome
• Edge
• Firefox 67+
• Opera

To set up 2FA with a U2F device:

1. Sign in to your GitLab account.
2. Go to your User settings.
3. Go to Account.
4. Click Enable Two-Factor Authentication.
5. Connect your U2F device.
6. Click on Set up New U2F Device.
7. A light begins blinking on your device. Activate it by pressing its button.

A message displays, indicating that your device was successfully set up. Click on Register U2F Device to complete the process.

WebAuthn device

The WebAuthn workflow is supported by the following desktop browsers:

• Chrome
• Edge
• Firefox
• Opera
• Safari

and the following mobile browsers:

• Chrome for Android
• Firefox for Android
• iOS Safari (since iOS 13.3)

To set up 2FA with a WebAuthn compatible device:

1. Sign in to your GitLab account.
2. Go to your User settings.
3. Go to Account.
4. Select Enable Two-Factor Authentication.
5. Plug in your WebAuthn device.
6. Select Set up New WebAuthn Device.
7. Depending on your device, you might need to press a button or touch a sensor.

A message displays, indicating that your device was successfully set up. Recovery codes are not generated for WebAuthn devices.

Recovery codes

Immediately after successfully enabling two-factor authentication, you’re prompted to download a set of generated recovery codes. Should you ever lose access to your one-time password authenticator, you can use one of these recovery codes to sign in to your account. We suggest copying and printing them, or downloading them using the Download codes button for storage in a safe place. If you choose to download them, the file is called gitlab-recovery-codes.txt.

The UI now includes Copy codes and Print codes buttons, for your convenience. Introduced in GitLab 13.7.

If you lose the recovery codes or just want to generate new ones, you can do so from the two-factor authentication account settings page or using SSH.

Signing in with 2FA Enabled

Signing in with 2FA enabled is only slightly different than the normal sign-in process. Enter your username and password credentials as you normally would, and you’re presented with a second prompt, depending on which type of 2FA you’ve enabled.

Sign in by using a one-time password

When asked, enter the pin from your one time password authenticator’s application or a recovery code to sign in.

Sign in by using a U2F device

To sign in by using a U2F device:

1. Click Login via U2F Device.
2. A light begins blinking on your device. Activate it by touching/pressing its button.

A message displays, indicating that your device responded to the authentication request, and you’re automatically signed in.

Sign in by using a WebAuthn device

In supported browsers you should be automatically prompted to activate your WebAuthn device (e.g. by touching/pressing its button) after entering your credentials.

A message displays, indicating that your device responded to the authentication request and you’re automatically signed in.

Disabling 2FA

If you ever need to disable 2FA:

1. Sign in to your GitLab account.
2. Go to your User settings.
3. Go to Account.
4. Click Disable, under Two-Factor Authentication.

This clears all your two-factor authentication registrations, including mobile applications and U2F / WebAuthn devices.

Support for disabling 2FA is limited, depending on your subscription level. For more information, see the Account Recovery section of our website.

Personal access tokens

When 2FA is enabled, you can no longer use your normal account password to authenticate with Git over HTTPS on the command line or when using the GitLab API. You must use a personal access token instead.

Recovery options

To disable two-factor authentication on your account (for example, if you have lost your code generation device) you can:

• Use a saved recovery code.
• Generate new recovery codes using SSH.
• Regenerate 2FA recovery codes.
• Ask a GitLab administrator to disable two-factor authentication on your account.

Use a saved recovery code

Enabling two-factor authentication for your account generated several recovery codes. If you saved these codes, you can use one of them to sign in.

To use a recovery code, enter your username/email and password on the GitLab sign-in page. When prompted for a two-factor code, enter the recovery code.

After you use a recovery code, you cannot re-use it. You can still use the other recovery codes you saved.

Generate new recovery codes using SSH

Users often forget to save their recovery codes when enabling two-factor authentication. If an SSH key is added to your GitLab account, you can generate a new set of recovery codes with SSH:

1. Run:

   ssh git@gitlab.com 2fa_recovery_codes
   

   On self-managed instances, replace gitlab.com in the command above with the GitLab server hostname (gitlab.example.com).

2. You are prompted to confirm that you want to generate new codes. Continuing this process invalidates previously saved codes:

   Are you sure you want to generate new two-factor recovery codes?
   Any existing recovery codes you saved will be invalidated. (yes/no)
   
   yes
   
   Your two-factor authentication recovery codes are:
   
   119135e5a3ebce8e
   11f6v2a498810dcd
   3924c7ab2089c902
   e79a3398bfe4f224
   34bd7b74adbc8861
   f061691d5107df1a
   169bf32a18e63e7f
   b510e7422e81c947
   20dbed24c5e74663
   df9d3b9403b9c9f0
   
   During sign in, use one of the codes above when prompted for your
   two-factor code. Then, visit your Profile Settings and add a new device
   so you do not lose access to your account again.
   

3. Go to the GitLab sign-in page and enter your username/email and password. When prompted for a two-factor code, enter one of the recovery codes obtained from the command-line output.

After signing in, visit your User settings > Account immediately to set up two-factor authentication with a new device.

Regenerate 2FA recovery codes

To regenerate 2FA recovery codes, you need access to a desktop browser:

1. Navigate to GitLab.
2. Sign in to your GitLab account.
3. Go to your User settings.
4. Select Account > Two-Factor Authentication (2FA).
5. If you’ve already configured 2FA, click Manage two-factor authentication.
6. In the Register Two-Factor Authenticator pane, click Regenerate recovery codes.

Ask a GitLab administrator to disable two-factor authentication on your account

If you cannot use a saved recovery code or generate new recovery codes, ask a GitLab global administrator to disable two-factor authentication for your account. This temporarily leaves your account in a less secure state. Sign in and re-enable two-factor authentication as soon as possible.

Note to GitLab administrators

• You need to take special care to that 2FA keeps working after restoring a GitLab backup.
• To ensure 2FA authorizes correctly with TOTP server, you may want to ensure your GitLab server’s time is synchronized via a service like NTP. Otherwise, you may have cases where authorization always fails because of time differences.

• The GitLab U2F implementation does not work when the GitLab instance is accessed from multiple hostnames, or FQDNs. Each U2F registration is linked to the current hostname at the time of registration, and cannot be used for other hostnames/FQDNs. The same applies to WebAuthn registrations.

  For example, if a user is trying to access a GitLab instance from first.host.xyz and second.host.xyz:

  • The user signs in by using first.host.xyz and registers their U2F key.
  • The user signs out and attempts to sign in by using first.host.xyz - U2F authentication succeeds.
  • The user signs out and attempts to sign in by using second.host.xyz - U2F authentication fails, because the U2F key has only been registered on first.host.xyz.
• To enforce 2FA at the system or group levels see Enforce Two-factor Authentication.

Enable or disable WebAuthn

Support for WebAuthn is under development and not ready for production use. It is deployed behind a feature flag that is disabled by default. GitLab administrators with access to the GitLab Rails console can enable it.

To enable it:

Feature.enable(:webauthn)

To disable it:

Feature.disable(:webauthn)

Troubleshooting

If you are receiving an invalid pin code error, this may indicate that there is a time sync issue between the authentication application and the GitLab instance itself.

To avoid the time sync issue, enable time synchronization in the device that generates the codes. For example:

• For Android (Google Authenticator):
  1. Go to the Main Menu in Google Authenticator.
  2. Select Settings.
  3. Select the Time correction for the codes.
  4. Select Sync now.
• For iOS:
  1. Go to Settings.
  2. Select General.
  3. Select Date & Time.
  4. Enable Set Automatically. If it’s already enabled, disable it, wait a few seconds, and re-enable.