Fortinet FortiGate BOVPN Virtual Interface Integration Guide

Deployment Overview

WatchGuard provides integration instructions to help our customers configure WatchGuard products to work with products created by other organizations. If you need more information or technical support about how to configure a third-party product, see the documentation and support resources for that product.

This integration guide describes how to configure a BOVPN virtual interface tunnel between a WatchGuard Firebox and a Fortinet FortiGate 60E.

Integration Summary

The hardware and software used in this guide include:

  • WatchGuard T55-W
    • Fireware v12.5.2 or higher
  • Fortinet FortiGate 60E
    • FortiOS v6.2.0 or higher

Topology

This diagram shows the topology for a BOVPN virtual interface connection between a Firebox and a Fortinet FortiGate 60E.

WatchGuard Firebox and Fortinet topology diagram

Configure the Firebox

To configure a BOVPN virtual interface on your Firebox, from Fireware Web UI:

  1. Select VPN > BOVPN Virtual Interfaces.
    The BOVPN Virtual Interfaces configuration page appears.
  2. Click Add.
  3. In the Interface Name text box, type a name to identify this BOVPN virtual interface.
  4. From Remote Endpoint Type drop-down list, select Cloud VPN or Third-Party Gateway.
  5. Keep the default Gateway Address Family setting, which is IPv4 Addresses.
  6. In the Credential Method section, select Use Pre-Shared Key.
  7. In the adjacent text box, type the pre-shared key.

Screenshot of the Fiirebox BOVPN virtual interfaces and gateway settings

  1. In the Gateway Endpoint section, click Add.
    The Gateway Endpoint Settings dialog box appears.
  2. On the Local Gateway tab, from the Physical drop-down list, select External.
  3. From the Interface IP Address drop-down list, select Primary Interface IPv4 Address.
  4. Select By IP Address.
  5. In the adjacent text box, type the public (external) IP address of your Firebox.

Screenshot of the Firebox local gateway settings

  1. On the Remote Gateway tab, select Static IP Address.
  2. In the adjacent text box, type the public IP address of the FortiGate 60E wan1 interface.
  3. Select By IP Address.
  4. In the adjacent text box, type the public IP address of the FortiGate 60E wan1 interface.

Screenshot of the Firebox remote gateway settings

  1. Click OK.
  2. In the Gateway Endpoint section, select Start Phase 1 tunnel when it is inactive.
  3. Select Add this tunnel to the BOVPN-Allow policies.
  4. Click Save.

Screenshot of the Firebox gateway settings

  1. Select the BOVPN virtual interface that you created.
  2. Click Edit.

Screenshot of the Firebox gateway settings

  1. Click the VPN Routes tab.
  2. Click Add.
  3. From the Choose Type drop-down list, select Network IPv4.
  4. In the Route To text box, type the IP segment of a route that will use this virtual interface.

Screenshot of the Firebox VPN route settings

  1. Click OK.

Screenshot of the Firebox VPN routes

  1. Click the Phase 1 Settings tab.
  2. From the Version drop-down list, select IKEv2.
  3. Keep all other Phase 1 settings as the default values.

Screenshot of the Firebox Phase 1 settings

  1. Keep Phase 2 Settings as the default values.

Screenshot of the Fortinet Phase 2 settings

  1. Click a Save.

Configure FortiGate 60E

Follow these steps to configure the interfaces, VPN settings, policies, and routes on your FortiGate device.

Interface Settings

  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 Network > Interfaces.
  3. Configure the external interface (wan1) and the internal interface (internal2). For information about how to configure interfaces, see the Fortinet User Guide.

Screen shot of the Fortinet interfaces

IPSec VPN Tunnels Settings

  1. Select VPN > IPsec Tunnels.

Screen shot of the Fortinet IPsec Tunnels

  1. Click Create New.
  2. In the Name text box, type the object name. In our example, the name is peer.
  3. Select Custom (No Template).

Screen shot of the Fortigate VPN creation wizard

  1. Click Next.
  2. In the Network section, for IP Version, select IPv4.
  3. From the Remote Gateway drop-down list, select Static IP Address.
  4. In the IP Address text box, type the WatchGuard Firebox public IP address. In our example, the IP address is 203.0.113.2.
  5. From the Interface drop-down list, select wan1. Leave the default value for all other settings in the Network section.

Screen shot of the Fortigate network configuration

  1. In the Authentication section, from the Method drop-down list, select Pre-shared Key.
  2. In the Pre-shared Key text box, type the pre-shared key.
  3. In the IKE section, for Version, select 2.

Screen shot of the Fortigate new VPN tunnel settings

  1. In the Phase 1 Proposal section, remove all proposals except AES256 for encryption and SHA256 for authentication.
  2. For the Diffie-Hellman Groups, select 14. Clear all other check boxes.
  3. Leave the default value for all other Phase 1 settings.

Screen shot of the Fortigate Phase 1 proposal

  1. In the Phase 2 Selectors section, expand Advanced.
  2. Remove all proposals except AES256 for encryption and SHA256 for authentication.
  3. Enable Enable Replay Detection.
  4. Enable Enable Perfect Forward Secrecy (PFS)
  5. For the Diffie-Hellman Groups, check 14. Clear all other check boxes.
  6. Leave the default value for all other Phase 2 selectors.

Screen shot of Fortigate Phase 2 selectors

Screen shot of the Fortigate Phase 2 proposal 2

  1. Click OK.

Screen shot of the Fortigate IPSec tunnels configuration

Policy Settings

  1. Select Policy & Objects > Addresses.

Screen shot of the Fortinet Addresses settings

  1. Click Create New > Address.
  2. In the Name text box, type a name for the IP address. In our example, the name is WatchGuard_INT.
  3. From the Type drop-down list, select Subnet.
  4. In the IP/Netmask text box, type the IP segment.
  5. Leave the default value for all other settings.

Screen shot of the Fortinet New Address dialog box

  1. Click OK.
  2. Repeat steps 1–7 to create another IP segment.

Screen shot of the Fortinet Addresses list

  1. Select Policy & Objects > IPv4 Policy.

Screen shot of the Fortinet IPv4 Policy list

  1. Click Create New.
  2. In the Name text book, type the object name. In our example, the name is policy1.
  3. From the Incoming Interface drop-down list, select internal2.
  4. From the Outgoing Interface drop-down list, select peer.
  5. From the Source Address drop-down list, select FortiGate 60E_INT.
  6. From the Destination Address drop-down list, select WatchGuard_INT.
  7. From the Schedule drop-down list, select always.
  8. From the Service drop-down list, select All.
  9. From the Action drop-down list, select Accept.
  10. Turn off the NAT.
  11. Leave the default value for all other settings.

Screen shot of the Fortinet New Policy settings

Screen shot of the Fortinet Protocol Options settings

  1. Click OK.
  2. Repeat these steps to create another policy.

Screen shot of the Fortinet Edit Policy page

Screen shot of the Fortinet Protocol Options settings

The polices that you created appear on this page.

Screen shot of the Fortinet IPv4 policy list

Route Settings

  1. From the navigation menu, select Network > Static Routes.

Screen shot of the Fortinet Static Routes list

  1. Click Create New.
  2. In the Destination > Subnet text box, type the IP segment of the VPN peer tunnel.
  3. From the Interface drop-down list, select peer.
  4. Leave the default value for all other settings.

Screen shot of the Fortinet Net Static Route settings

  1. Click OK.
  2. Repeat these steps to configure wan1.

Screen shot of the Fortinet Static Routes list

Test the Integration

To test the integration, from Fireware Web UI:

  1. Select System Status > VPN Statistics.
  2. Verify that the VPN tunnel is active.

To test the integration, from the FortiGate Web UI:

  1. Select Monitor > IPsec Monitor.
  2. Verify that the VPN tunnel is active.

Finally, verify that the servers at Host1 and Host2 can successfully ping each other.