Fortinet SSL VPN Integration with AuthPoint Gateway

Deployment Overview

This document describes how to set up multi-factor authentication (MFA) for your Fortinet Firewall with AuthPoint, and configure your Fortinet Firewall to integrate with AuthPoint RADIUS.

Your Fortinet Firewall must already be configured and deployed before you set up MFA with AuthPoint.

This integration was tested with version 7.2.2 of Fortinet FortiGate 60E.

Fortinet SSL VPN Authentication Data Flow with AuthPoint

AuthPoint communicates with various cloud-based services and service providers with the RADIUS protocol. This diagram shows the data flow of an MFA transaction for RADIUS.

Before You Begin

Before you begin these procedures, make sure that:

• You have installed and configured the AuthPoint Gateway (see About Gateways).
• End-users can log in to the FortiGate 60E Firewall.
• You have a FortiClient V7.0.5 or higher.
• A token is assigned to a user in AuthPoint.

Configure Fortinet 60E Firewall

Configure a RADIUS Server

To use RADIUS authentication with FortiGate Firewall VPN you must add a RADIUS server (the AuthPoint Gateway). The AuthPoint Gateway functions as a RADIUS server and must be installed somewhere on your network that has Internet access and that can connect to your RADIUS clients. For more information, see About Gateways.

To configure a RADIUS server:

1. Log in to the FortiGate 60E web UI at https://<IP address of FortiGate 60E>. The default IP address is 192.168.1.99
2. Select User & Authentication > RADIUS Servers.
3. Click Create New.

4. In the Name text box, type a name for the RADIUS server. In this example, we type AuthPoint Gateway.
5. In the IP/Name text box, type the IP address of the AuthPoint Gateway (RADIUS server).
6. In the Secret text box, type a shared secret to identify your RADIUS client.
   Use the same shared key when you configure your RADIUS client resource in AuthPoint.
7. Click OK.

Configure a User Group

After you have added the AuthPoint Gateway RADIUS server, a group will authenticate with this server must be defined.
You can also create a user assigned to the group. For more information about groups and users, see Fortinet Documents Library.

To configure a user group:

1. Select User & Authentication > User Groups.
2. Click Create New.

3. In the Name text box, type a name. In this example, we type Radius User Group.
4. In the Type list, select Firewall.
5. In the Remote Groups section, click Add.
6. From the Remote Server drop-down list, select the AuthPoint Gateway you created in previous section.
7. For Groups, select Any.
8. Click OK.
9. Click OK.

Configure SSL VPN Settings

To configure SSL VPN settings:

1. Select VPN > SSL-VPN Settings.

2. From the Listen on Interfaces(s) drop-down list, select van1.
3. In the Listen on Port text box, type 10443.
4. From the Server Certificate drop-down list, select Fortinet_Factory.
5. Click the Idle Logout toggle.
6. Scroll to Authentication/Portal Mapping section. Click Create New.
7. From the Users/Groups drop-down list, select the Radius User Group you created in configuring a user group section.
8. From the Portal drop-down list, select full-access.
9. Click OK.
10. Leave other settings as the default values.

11. Click Apply.

Create an SSL VPN Policy

You must create an SSL VPN policy to allow specific users and groups to use the SSL VPN.

To create an SSL VPN policy:

1. Select Policy & Objects > Firewall Policy.
2. Click Create New.

3. In the Name text box, type a name.
4. From the Incoming Interface drop-down list, select SSL-VPN tunnel interface(ssl.root).
5. From the Outgoing Interface drop-down list, select the internal interface connected to the AuthPoint Gateway. In this example, we select internal.
6. From the Source drop-down list, for Address, select all. For User, select Radius User Group.
7. From the Destination drop-down list, for Address, select the internal protected subnet. In this example, we select internal.
8. From the Schedule drop-down list, select always.
9. From the Service drop-down list, select All.
10. Leave other settings as the default values.

11. Click OK.

Configure AuthPoint

Before AuthPoint can receive authentication requests from Fortinet 60E, you must:

• Specify Fortinet 60E as a RADIUS client resource In AuthPoint, resources are the applications and services that your users connect to. in AuthPoint.
• Add a Zero Trust authentication policy Authentication policies specify which resources users can authenticate to and which authentication methods they can use (Push, QR code, and OTP). for the Fortinet 60E RADIUS client resource or add the Fortinet 60E RADIUS client resource to an existing authentication policy.
• Bind the Fortinet 60E RADIUS client resource to the AuthPoint Gateway.

Add a Fortinet 60E Resource in AuthPoint

From the AuthPoint management UI:

1. From the navigation menu, select Resources. Click Add Resource.
   The Add Resource page opens.

2. From the Type drop-down list, select RADIUS Client.
   Additional fields appear.

3. In the Name text box, type a name for this resource.
4. In the RADIUS client trusted IP or FQDN text box, type the FortiGate 60E internal interface IP address. In this example, we type 192.168.1.99.
5. In the Value sent for RADIUS attribute 11(Filter-Id) drop-down list, select User's AuthPoint group.
6. In the Shared Secret text box, type the shared secret that is same as the one you configured in Fortinet RADIUS Server section.
7. Click Save.

Add a Group in AuthPoint

You must have at least one user group in AuthPoint to configure MFA. If you already have a group, you do not have to add another group.

To add a WatchGuard Cloud-hosted group to the WatchGuard Cloud Directory:

1. Go to Configure > Directories and Domain Services.
2. Click the WatchGuard Cloud Directory domain name. If you have not yet added the WatchGuard Cloud Directory, click Add Authentication Domain and select the WatchGuard Cloud Directory.
   The New Group page appears.

3. In the Groups tab, click Add Group.
4. In the Group Name text box, type a descriptive name for the group.
5. (Optional) In the Description text box, type a description of the group.

6. Click Save.
   Your group is added to the WatchGuard Cloud Directory and to AuthPoint.

Add a Zero Trust Authentication Policy

Zero Trust policies specify which resources users can authenticate to and which authentication methods they can use (Push, QR code, and OTP).

You must have at least one Zero Trust authentication policy that includes the Fortinet 60E RADIUS client resource. If you already have Zero Trust authentication policies, you do not have to create a new authentication policy. You can add this resource to your existing authentication policies.

Users that do not have an authentication policy for a specific resource cannot authenticate to log in to that resource.

To configure a Zero Trust authentication policy:

1. Go to Configure > Zero Trust. If you have a Service Provider account, you must select an account from Account Manager.
2. Click Add Policy.
3. Type a name for this policy.
4. In the Target section, from the Content drop-down list, select which groups this policy applies to. You can make multiple selections to add multiple groups.
5. In the Resources section, select the AuthPoint resources this policy applies to.
6. In the Conditions section, select the conditions that apply to this policy. When you add a condition to an authentication policy, the policy applies only to user authentications that match the policy and the policy conditions. For example, if you add a time schedule to a policy, the policy only applies to user authentications that occur within that time schedule. Users who only have a policy that includes a time schedule do not get access to the resource when they authenticate outside of the allowed times (because they do not have a policy that applies, not because authentication is denied). For more information, go to About Zero Trust Conditions

   For RADIUS authentication, policies that have a Network Location do not apply because AuthPoint does not have the IP address of the user.

   1. (Optional) To create a new condition, click Add New Condition. After you create a new condition, you must still add the condition to the policy.
   2. From the Type drop-down list, select the type of condition to add to the policy.
   3. From the Name drop-down list, select which condition of the chosen type to add to the policy.
   4. To add more conditions, repeat Step 6.

      If you add conditions to a policy, we recommend that you create a second policy for the same groups and resources without the conditions. Assign a higher priority to the policy with the policy objects. For more information about priority, go to About Zero Trust Policy Precedence.

7. In the Action section, select an option to specify whether to allow or deny authentications for the resources in this policy. In our example, we want to allow authentications.
   • Allow — Allow user groups in this policy access to the resources associated with this policy.
• Deny — Deny authentications when users in the groups associated with this policy try to authenticate to the resources associated with this policy.
8. If you allow access with this policy, select the check box for each authentication option users can select when they authenticate to resources in this policy with MFA.

   If you enable the push and OTP authentication methods for a policy, RADIUS client resources associated with that policy use push notifications to authenticate users.

   QR code authentication is not supported for RADIUS client resources.

   For RADIUS authentication, you append your OTP to the end of your password. Do not add a space. For example, password112233.

9. Click Save.
   Your policy is created and added to the end of the policy list.
10. Review the order of your policies and adjust as necessary. For more information about priority, go to About Zero Trust Policy Precedence.

Bind the RADIUS Resource to a Gateway

To use RADIUS authentication with AuthPoint, you must have the AuthPoint Gateway installed on your corporate network and you must assign your RADIUS resources to the Gateway in the AuthPoint management UI. The Gateway functions as a RADIUS server.

If you have not configured and installed the AuthPoint Gateway, see About Gateways.

To bind the RADIUS resource to a gateway:

1. From the navigation menu, select Gateway.
2. Select the Name of the Gateway.

3. From the RADIUS section, in the Port text box, type the port number used to communicate with the Gateway. The default ports are 1812 and 1645.

   If you already have a RADIUS server installed that uses port 1812 or 1645, you must use a different port for the AuthPoint Gateway.

4. From the Select a RADIUS Resource drop-down list, select your RADIUS client resource.
5. Click Save.

Add Users to AuthPoint

Before you assign users to a group, you must add the users to AuthPoint. There are two ways to add AuthPoint user accounts:

• Sync users from an external user database
• Add WatchGuard Cloud-hosted AuthPoint users

Each user must be a member of a group. You must add at least one group before you can add users to AuthPoint.

Test the Integration

To test the integration of AuthPoint and the configuration of your Fortinet 60E Firewall, you can authenticate with a mobile token on your mobile device. For RADIUS resources, you can select the one-time password (OTP) or push authentication methods.

In this example, we show the one-time password authentication method.

1. Start Forticlient.
2. Click Configure VPN.
3. In the Connection Name text box, type the name of this connection.
4. (Optional) In the Description text box, type a description.
5. In the Remote Gateway text box, type the IP address of the listen on interface in Fotinet.
6. Check Customize port, type 10443.
7. In the Client Certificate drop-down list, select None.
8. Click Save.
9. In the Username text box, type your AuthPoint user name.
10. In the Password text box, type your AuthPoint password and your OTP (the OTP for your token shows in the AuthPoint mobile app). Do not add a space between your password and your OTP.
11. Click Connect.