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# Sign-in restrictions **(CORE ONLY)**

You can use **Sign-in restrictions** to customize authentication restrictions for web interfaces as well as Git over HTTP(S).

## Settings

To access sign-in restriction settings:

1. Navigate to the **Admin Area > Settings > General**.
1. Expand the **Sign-in restrictions** section.

## Password authentication enabled

You can restrict the password authentication for web interface and Git over HTTP(S):

- **Web interface**: When this feature is disabled, an [external authentication provider](../../../administration/auth/README.md) must be used.
- **Git over HTTP(S)**: When this feature is disabled, a [Personal Access Token](../../profile/personal_access_tokens.md) must be used to authenticate.

## Two-factor authentication

When this feature enabled, all users must use the [two-factor authentication](../../profile/account/two_factor_authentication.md).

Once the two-factor authentication is configured as mandatory, the users are allowed
to skip forced configuration of two-factor authentication for the configurable grace
period in hours.

![Two-factor grace period](img/two_factor_grace_period.png)

## Email notification for unknown sign-ins

> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/218457) in GitLab 13.2.

When enabled, GitLab notifies users of sign-ins from unknown IP addresses or devices. For more information,
see [Email notification for unknown sign-ins](../../profile/unknown_sign_in_notification.md).

![Email notification for unknown sign-ins](img/email_notification_for_unknown_sign_ins_v13_2.png)

## Sign-in information

All users that are not logged in are redirected to the page represented by the configured
**Home page URL** if value is not empty.

All users are redirected to the page represented by the configured **After sign out path**
after sign out if value is not empty.

In the **Sign-in restrictions** section, scroll to the **Sign-in text** field. You can add a
custom message for your users in Markdown format.

For example, if you include the following information in the noted text box:

```markdown
# Custom sign-in text

To access this text box, navigate to Admin Area > Settings > General, and expand the "Sign-in restrictions" section.
```

Your users see the **Custom sign-in text** when they navigate to the sign-in screen for your
GitLab instance:

![Sign-in page](img/custom_sign_in_page_v13_6.png)

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