---
title: Enabling and disabling two-factor authentication
summary: null
url: >-
  https://www.fastly.com/documentation/guides/next-gen-waf/account-info/enabling-and-disabling-two-factor-authentication
---

> **IMPORTANT:** This guide only applies to customers with Signal Sciences accounts that aren't linked to Fastly accounts. If you have linked a Signal Sciences account to a Fastly account or just have a Fastly account, check out our guide to [enabling and disabling two-factor authentication](https://www.fastly.com/documentation/guides/account-info/user-and-account-management/managing-two-factor-authentication) instead.

We support two-factor authentication (2FA) via apps that support both HMAC-based One-time Password (HOTP) (RFC-4226) and Time-based One-time Password (TOTP) (RFC-6238). This includes [Duo Security](https://guide.duosecurity.com/iphone) and [Google Authenticator](https://support.google.com/accounts/answer/1066447) for both iPhone and Android.

> **IMPORTANT:** We don’t support 2FA enforcement.

## Enabling two-factor authentication

Two-factor authentication settings are set at the user-level for a particular corp. This means that a user only needs to configure two-factor authentication once to access all the sites to which they belong.

1. From the **My Profile** menu, select **Account Settings**.

2. Select **Enable**.

3. Scan the QR code with your authenticator app or click **Enter code manually instead** and enter the code manually into your authenticator app.

   ![the 2fa QR code](/img/ngwaf/account-security-2fa-scan-qr-code-sigsci-only-login.png)

   > **IMPORTANT:** The QR code above is an example. Scan the one that appears in the control panel, not in this guide.

4. Enter a name for your device.

5. Click **Continue**.

6. Enter the verification code from your authenticator app.

7. Click **Verify**.

## Disabling two-factor authentication

1. From the **My Profile** menu, select **Account Settings**.
2. Click **Disable two-factor authentication** to disable two-factor authentication.

## Related content

- [Setting up single sign-on (SSO)](https://www.fastly.com/documentation/guides/next-gen-waf/account-info/setting-up-single-sign-on-sso)