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Two-Factor Authentication (2FA) for Google Apps (G Suite)

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G Suite (Google) 2FA (Two-Factor Authentication) or Multi-Factor Authentication is the process of secure Authentication in which a user or an organizational employee have to provide two factors to gain the access to Google G Suite Cloud Data. G Suite (Google Apps) Two-Factor Authentication starts with user submitting his traditional username and password. Once user successfully gets authenticated with the 1st step verification, configured 2FA (OTP over SMS, Push Notifications, Google Authenticator etc) method prompts on for 2nd-step verification. After successfully authenticating with both of the steps a user is granted with the access to the G Suite/Google resources. This additional verification layer prevents the unauthorized person from accessing the resources even if cyber attackers get to know your credentials.
miniorange provides 15+ authentication methods and solutions for various use cases. It allows users and organization to setup certain authentication and settings which includes password restrictions, restricting sign-in methods, as well as other security settings. miniorange also make way for authentication apps that support Time-Based One-Time Password (TOTP) Google Authenticator, Microsoft Authenticator, Authy 2-Factor authentication app and our own miniorange Authenticator app.

Follow the Step-by-Step Guide given below for Google Apps (G Suite) Single Sign-On (SSO)

1. Configure Google Apps (G Suite) in miniOrange

• Login into miniOrange Admin Console.
• Go to Apps and click on Add Application button.



• In Choose Application Type click on Create App button in SAML/WS-FED application type.



• Search for Google Apps (G Suite) in the list, if you don't find Google Apps (G Suite) in the list then, search for custom and you can set up your application via Custom SAML App.

• Enter the SP Entity ID or Issuer as google.com.
• Enter the ACS URL as https://www.google.com/a/[domain_name]/acs.
• Enter the Single Logout URL as https://mail.google.com/a/out/tld/?logout.
• Enter the Domain Administrator in Google Apps (G Suite) Administrator field and click on "Verify Google Apps Administrator" to verify if the domain entered is of administrator (this is an optional field).
• Leave the Attributes section empty.



• Go to the Add Policy and select DEFAULT from the Group Name dropdown.
• Now enter the name for your app authentication policy in the Policy Name field.
• Select PASSWORD from the First Factor Type dropdown.
• Click on Save to add Google Apps (G Suite).



• Click on Metadata link to download the metadata which will be required later. Click on Link to see the IDP initiated SSO link for Google Apps (G Suite).



• Keep SAML Login URL,SAML Logout URL and click on the Download Certificate button which you will require in Step 4.

2. Configure SSO in Google Apps (G Suite)

• Now login to Google Admin Console and select Security Tab from Admin Console.



• From listed options select Set up single sign-on (SSO) with a third party IdP.



• Enable Setup SSO with third party identity provider option.
• Enter Sign-In Page URL: SAML Login URL from Step 1.
• Enter Sign-Out Page URL: < Base Server Url >/idp/oidc/logout?post_logout_redirect_uri=https://gmail.com
  Example: https://login.xecurify.com/moas/idp/oidc/logout?post_logout_redirect_uri=https://gmail.com
  
• Enter Change Password URL: SAML Login URL from Step 1.
• Upload the certificate that was downloaded earlier in Step 1.
• Select Enable Single Sign-On check box and save the settings.

3. Configure 2FA for Google Apps (G Suite)

3.1: Configure 2FA for miniOrange Admin Dashboard.

• From your miniOrange Dashboard in the left navigation bar, select 2- Factor Authentication, click on Configure 2FA.




• Choose any 2FA method you want to configure.
• Let's say you want to configure OTP over SMS
• Click on OTP over SMS





• Now add your mobile number on which you want to receive the OTP.
• Then click on Save.





• Now as shown in the above image, OTP over SMS is your Active 2FA method.
• Enable Prompt for second factor during signin to your console.
• Then click on Save.



• To verify the configuration login again.
• You will be asked for Username and password then it is redirected to below page:
• Enter the OTP received on the phone and click on verify.



• If you are redirected to your dashboard, you have successfully configured OTP over SMS as your 2FA method.
• Similarly you can configure rest of the 2FA methods for miniOrange dashboard by following this guide.
• To configure 2FA methods for end-users, You can find the guide here.

3.2: Enable 2FA for Users of Google Apps (G Suite) application.

• To enable 2FA for Users of Google Apps (G Suite) application. Go to Policies >> App Authentication Policy
• Click on Edit against the configured application



• Enable the Enable 2-Factor Authentication (MFA) option.



• Click on Save.

4. Login with miniOrange

• Go to your Google Apps (G Suite) Domain. It will redirect you to miniOrange Single Sign-On Service console.



• Enter your miniOrange login credentials and click on Login.
• Since we have Two-factor authentication(2FA) enabled, you will be prompted to register for it. It's a one time process.
• Configure your basic details.



• Configure any authentication method of your choice.



• After successful registration, you will be logged in to your Google Apps (G Suite) account.
• Now we have Two-factor authentication enabled.
• To verify your Two-factor authentication(2FA) configuration, go to your Google Apps (G Suite) Domain. You will be redirected to miniOrange login console.



• Enter your login credentials, and click on login. It will prompt to verify yourself against the configured 2fa method.
  e.g. If you have configured OTP over SMS, after login into Google Apps (G Suite) it will prompt for OTP.



• Enter the OTP received in your phone, after successful 2fa verification, you will be redirected to the Google Apps (G Suite) dashboard.

5. Adaptive Authentication with Google Apps (G Suite)

A. Restricting access to Google Apps (G Suite) with IP Blocking

You can use adaptive authentication with Google Apps (G Suite) Single Sign-On (SSO) to improve the security and functionality of Single Sign-On. You can allow a IP Address in certain range for SSO or you can deny it based your requirements and you can also challenge the user to verify his authenticity. Adaptive authentication manages the user authentication bases on different factors such as Device ID, Location, Time of Access, IP Address and many more.

You can configure Adaptive Authentication with IP Blocking in following way:

• Login to Self Service Console >> Adaptive Authentication.
• Add a Policy Name for your Adaptive Authentication Policy.



• Select your Action for behaviour Change and Challenge Type for user from the Action for behaviour Change Section.





Action for behaviour Change Options :




Attribute	Description
Allow	Allow user to authenticate and use services if Adaptive authentication condition is true.
Challenge	Challenge users with one of the three methods mentioned below for verifying user authenticity.
Deny	Deny user authentications and access to services if Adaptive authentication condition is true.




Challenge Type Options :




Attribute	Description
User second Factor	The User needs to authenticate using the second factor he has opted or assigned for such as OTP over SMS PUSH Notification OTP over Email And 12 more methods.
KBA (Knowledge-based authentication)	The System will ask user for 2 of 3 questions he has configured in his Self Service Console. Only after right answer to both questions user is allowed to proceed further.
OTP over Alternate Email	User will receive a OTP on the alternate email he has configured threw Self Service Console. Once user provides the correct OTP he is allowed to proceed further.



• Now Enable Enable IP Restriction option from the IP RESTRICTION CONFIGURATION section to configure custom IP range.



• Select the Action you want to perform if the IP address is out of the range. i.e. Allow, Challenge & Deny.
• Specify the IP Address range for which you want above setting to reflect. You can add more than one IP Address ranges by clicking on following button +.
• Scroll to the end and click on save.

B. Adaptive Authentication with Limiting number of devices.

Using Adaptive Authentication you can also restrict the number of devices the end user can access the Services on. You can allow end users to access services on a fixed no. of devices. The end users will be able to access services provided by us on this fixed no. of devices.

You can configure Adaptive Authentication with Device Restriction in following way


• Login to Self Service Console >> Adaptive Authentication.
• Add a Policy Name for your Adaptive Authentication Policy.
• Select your Action for behaviour Change and Challenge Type for user from the Action for behaviour Change Section.




• Scroll down to Device Configuration section and enable Allow User to Register Device option to allow users to register their devices.
• Enter the Number of Devices which are allowed to register in field next to Number of Device Registrations Allowed
• Choose Action if number of devices exceeded (This will override your setting for Action for Behaviour Change.)
1. Challenge: The user needs to verify himself using any of the three methods mentioned in table in step 5.1
2. Deny : Deny users access to the system
• Enable option Send email alerts to Users if number of Device registrations exceeded allowed count if you want to alert the user about no of devices exceeding the limit. Save the configuration.

C. Add Adaptive Authentication policy to Google Apps (G Suite).

• Login to Self Service Console >> Policies.
• Click on Edit option for predefined SAML app policy.



• Set your application name in the Application and select password as Login Method.
• Enable Adaptive Authentication on Policy page and select the required restriction method as an option.
• From Select Login Policy dropdown select the policy we created in last step and click on save.




How to add a trusted Device

1. When End-user log in to the self service console after the policy for device restriction is on, he is provided the option to add the current device as a trusted device.

External References

• Know more about Two-Factor Authentication (2FA)
  
• Looking for SSO and 2FA around other Google Apps