> ## Documentation Index > Fetch the complete documentation index at: https://docs.preprod.world/llms.txt > Use this file to discover all available pages before exploring further. # Set up two-factor authentication Two-factor authentication (2FA) adds a second verification step to Hosting Portal login. After enabling it, each login requires a six-digit one-time code from Google Authenticator in addition to the standard credentials. ## Enable two-factor authentication 1. Log in to the [Gcore Hosting Portal](https://hosting.gcore.com/billmgr). 2. In the **Client** section of the sidebar, click **User settings**. 3. Navigate to the **Two-factor authentication** section and click **Enable two-factor authentication**. User settings page with the Two-factor authentication section and Enable link 4. On the setup form, scan the QR code with the Google Authenticator app. Two-factor authentication setup form showing QR code, Key, and Temporary password fields If the QR code cannot be read, enter the value from the **Key** field manually into the app. The key is regenerated each time the setup form opens — if QR code or key files were saved previously, download fresh copies using the **Save QR-code** and **Save key** links on the form. 5. In the **Temporary password** field, enter the six-digit code generated by the app. The code is time-based. Verify that the time and time zone on the phone match the **Server time** shown on the form. A difference greater than one minute causes the code to be rejected. 6. Click **Ok**. ## Authorize with two-factor authentication 1. On the [Hosting Portal](https://hosting.gcore.com/billmgr?func=logon) login page, enter the account login and password. 2. In the **Language** field, select the interface language. 3. Click **Sign in**. Hosting Portal login page with Login, Password, Language fields and Sign in button 4. On the confirmation page, enter the six-digit code from Google Authenticator in the **Temporary password** field. Verify that the exact time and time zone are set correctly on the phone. An incorrect clock causes the code to be rejected. 5. Click **Ok**. ## Disable two-factor authentication 1. In the **Client** section of the sidebar, click **User settings**. 2. Navigate to the **Two-factor authentication** section. 3. In the **Disable two-factor authentication** field, enter the six-digit code from the Google Authenticator app. 4. Click **Ok**. ## Recover access If the verification code is unavailable, contact technical support at [support@gcore.com](mailto:support@gcore.com) or via chat on [gcore.com](https://gcore.com). Provide the account name and the phone number used during registration.