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Two-factor authentication

DETAILS: Tier: Free, Premium, Ultimate Offering: GitLab.com, Self-managed

Two-factor authentication (2FA) provides an additional level of security to your GitLab account. For others to access your account, they would need your username and password and access to your second factor of authentication.

GitLab supports as a second factor of authentication:

  • Time-based one-time passwords (TOTP). When enabled, GitLab prompts you for a code when you sign in. Codes are generated by your one-time password authenticator (for example, a password manager on one of your devices).
  • WebAuthn devices. You're prompted to activate your WebAuthn device (usually by pressing a button on it) when you supply your username and password to sign in. This performs secure authentication on your behalf.

If you set up a device, also set up a TOTP so you can still access your account if you lose the device.

Use personal access tokens with two-factor authentication

When 2FA is enabled, you can't use your password to authenticate with Git over HTTPS or the GitLab API. You can use a personal access token instead.

OAuth credential helpers

The following Git credential helpers authenticate to GitLab using OAuth. This is compatible with two-factor authentication. The first time you authenticate, the helper opens the web browser and GitLab asks you to authorize the app. Subsequent authentication requires no interaction.

Git Credential Manager

Git Credential Manager (GCM) authenticates by default using OAuth. GCM supports GitLab.com without any manual configuration. To use GCM with self-managed GitLab, see GitLab support.

So you do not need to re-authenticate on every push, GCM supports caching as well as a variety of platform-specific credential stores that persist between sessions. This feature is useful whether you use personal access tokens or OAuth.

Git for Windows includes Git Credential Manager.

Git Credential Manager is developed primarily by GitHub, Inc. It is an open-source project and is supported by the community.

git-credential-oauth

git-credential-oauth supports GitLab.com and several popular public hosts without any manual configuration needed. To use with self-managed GitLab, see the git-credential-oauth custom hosts documentation.

Many Linux distributions include git-credential-oauth as a package.

git-credential-oauth is an open-source project supported by the community.

Enable two-factor authentication

You can enable 2FA using a:

  • One-time password authenticator. After you enable 2FA, back up your recovery codes.
  • WebAuthn device.

Your account email must be confirmed to enable 2FA.

Enable one-time password

To enable 2FA with a one-time password:

  1. In GitLab:
    1. Access your User settings.
    2. Select Account.
    3. Select Enable Two-factor Authentication.
  2. On your device (usually your phone):
    1. Install a compatible application. For example:
    2. In the application, add a new entry in one of two ways:
      • Scan the code displayed by 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 Pin code.
    2. Enter your current password.
    3. Select Submit.

If you entered the correct pin, GitLab displays a list of recovery codes. Download them and keep them in a safe place.

Enable one-time password using FortiAuthenticator

On self-managed GitLab, by default this feature is not available. To make it available per user, an administrator can enable the feature flag named forti_authenticator. On GitLab.com and GitLab Dedicated, this feature is not available.

You can use FortiAuthenticator as a one-time password (OTP) provider in GitLab. Users must:

  • Exist in both FortiAuthenticator and GitLab with the same username.
  • Have FortiToken configured in FortiAuthenticator.

You need a username and access token for FortiAuthenticator. The access_token shown below is the FortAuthenticator access key. To get the token, see the REST API Solution Guide at Fortinet Document Library. Tested with FortAuthenticator version 6.2.0.

Configure FortiAuthenticator in GitLab. On your GitLab server:

  1. Open the configuration file.

    For Linux package installations:

    sudo editor /etc/gitlab/gitlab.rb

    For self-compiled installations:

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

  2. Add the provider configuration.

    For Linux package installations:

    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 self-compiled installations:

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

  3. Save the configuration file.

  4. Reconfigure (Linux package installations) or restart (self-compiled installations).

Enable one-time password using Cisco Duo

FLAG: On self-managed GitLab, by default this feature is available. On GitLab.com this feature is not available.

You can use Cisco Duo as an OTP provider in GitLab.

DUO® is a registered trademark of Cisco Systems, Inc., and/or its affiliates in the United States and certain other countries.

Prerequisites

To use Cisco Duo as an OTP provider:

  • Your account must exist in both Cisco Duo and GitLab, with the same username in both applications.
  • You must have configured Cisco Duo and have an integration key, secret key, and API hostname.

For more information, see the Cisco Duo API documentation.

GitLab 15.10 has been tested with Cisco Duo version D261.14

Configure Cisco Duo in GitLab

On your GitLab server:

  1. Open the configuration file.

    For Linux package installations:

    sudo editor /etc/gitlab/gitlab.rb

    For self-compiled installations:

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

  2. Add the provider configuration.

    For Linux package installations:

     gitlab_rails['duo_auth_enabled'] = false
 gitlab_rails['duo_auth_integration_key'] = '<duo_integration_key_value>'
 gitlab_rails['duo_auth_secret_key'] = '<duo_secret_key_value>'
 gitlab_rails['duo_auth_hostname'] = '<duo_api_hostname>'

    For self-compiled installations:

    duo_auth:
  enabled: true
  hostname: <duo_api_hostname>
  integration_key: <duo_integration_key_value>
  secret_key: <duo_secret_key_value>

  3. Save the configuration file.

  4. For Linux package installations, reconfigure GitLab. For self-compiled installations, restart GitLab.

Enable one-time password using FortiToken Cloud

DETAILS: Offering: Self-managed

FLAG: On self-managed GitLab, by default this feature is not available. To make it available per user, an administrator can enable the feature flag named forti_token_cloud. On GitLab.com and GitLab Dedicated, this feature is not available. This feature is not ready for production use.

You can use FortiToken Cloud as a one-time password (OTP) provider in GitLab. Users must:

  • Exist in both FortiToken Cloud and GitLab with the same username.
  • Have FortiToken configured in FortiToken Cloud.

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

Configure FortiToken Cloud in GitLab. On your GitLab server:

  1. Open the configuration file.

    For Linux package installations:

    sudo editor /etc/gitlab/gitlab.rb

    For self-compiled installations:

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

  2. Add the provider configuration.

    For Linux package installations:

    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 self-compiled installations:

    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 (Linux package installations) or restart (self-compiled installations).

Set up a WebAuthn device

FLAG: On self-managed GitLab, by default, optional one-time password authentication for WebAuthn devices is not available. To enable the feature, an administrator can enable the feature flag named webauthn_without_totp. On GitLab.com, this feature is available. On GitLab Dedicated, this feature is not available.

WebAuthn is supported by the following:

  • Desktop browsers:
    • Chrome
    • Edge
    • Firefox
    • Opera
    • Safari
  • Mobile browsers:
    • Chrome for Android
    • Firefox for Android
    • iOS Safari (since iOS 13.3)

To set up 2FA with a WebAuthn-compatible device:

  1. Optional. Set up a one-time password.
  2. Access your User settings.
  3. Select Account.
  4. Select Enable Two-Factor Authentication.
  5. Plug in your WebAuthn device.
  6. Enter a device name and in GitLab 15.10 and later, your GitLab account password. You might not need to enter this password if you have signed in through your identity provider.
  7. Select Set up New WebAuthn Device.
  8. Depending on your device, you might have to press a button or touch a sensor.

You should receive a message indicating that you successfully set up your device.

When you set up 2FA with a WebAuthn-compatible device, that device is linked to a specific browser on a specific computer. Depending on the browser and WebAuthn device, you might be able to configure settings to use the WebAuthn device on a different browser or computer.

If this is the first time you have set up 2FA, you must download recovery codes so you can recover access to your account if you lose access.

WARNING: You can lose access to your account if you clear your browser data.

Recovery codes

Immediately after successfully enabling 2FA with a one-time password, you're prompted to download a set of generated recovery codes. If you ever lose access to your one-time password authenticator, you can use one of these recovery codes to sign in to your account.

WARNING: Each code can be used only once to sign in to your account.

You should copy and print the codes, or use Download codes to download them for storage in a safe place. If you choose to download them, the file is called gitlab-recovery-codes.txt.

  • Recovery codes are not generated for WebAuthn devices.
  • gitlab-sshd is not suitable for regenerating recovery codes.

If you lose the recovery codes, or want to generate new ones, you can use either:

Regenerate two-factor authentication recovery codes

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

  1. Access your User settings.
  2. Select Account > Two-Factor Authentication (2FA).
  3. If you've already configured 2FA, select Manage two-factor authentication.
  4. In the Disable two-factor authentication section, select Regenerate recovery codes.
  5. On the dialog, enter your current password and select Regenerate recovery codes.

NOTE: If you regenerate 2FA recovery codes, save them. You can't use any previously created 2FA codes.

Sign in with two-factor authentication enabled

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

Sign in using a one-time password

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

Sign in using a WebAuthn device

In supported browsers, you should be automatically prompted to activate your WebAuthn device (for example, by touching or 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.

Disable two-factor authentication

You can disable the TOTP authenticator and WebAuthn devices individually or simultaneously. To disable them simultaneously:

  1. Access your User settings.
  2. Select Account.
  3. Select Manage two-factor authentication.
  4. In the Disable two-factor authentication section, select Disable two-factor authentication.
  5. On the dialog, enter your current password and select Disable two-factor authentication.

This clears all your 2FA registrations, including mobile applications and WebAuthn devices.

Information for GitLab administrators

DETAILS: Tier: Free, Premium, Ultimate Offering: Self-managed

  • Take care that 2FA keeps working after restoring a GitLab backup.

  • To ensure 2FA authorizes correctly with a time-based one-time password (TOTP) server, synchronize your GitLab server's time using a service like NTP. Otherwise, authorization can always fail because of time differences.

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

    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 WebAuthn key.
    • The user signs out and attempts to sign in by using first.host.xyz - WebAuthn authentication succeeds.
    • The user signs out and attempts to sign in by using second.host.xyz - WebAuthn authentication fails, because the WebAuthn key has only been registered on first.host.xyz.

  • To enforce 2FA at the system or group levels see, Enforce two-factor authentication.