SSL VPN with FortiToken Mobile Push authentication

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SSL VPN with FortiToken Mobile Push authentication

This topic provides a sample configuration of SSL VPN that uses FortiToken Mobile Push two-factor authentication. If you enable push notifications, the user can easily accept or deny the authentication request.

Sample network topology

Sample configuration

WAN interface is the interface connected to ISP. This example shows static mode. You can also use DHCP or PPPoE mode. The SSL VPN connection is established over the WAN interface.

To configure SSL VPN using the GUI:

  1. Configure the interface and firewall address. Port1 interface connects to the internal network.
    1. Go to Network > Interface and edit the wan1
    2. Set IP/Network Mask to 20.120.123/255.255.255.0.
    3. Edit port1 interface and set IP/Network Mask to 168.1.99/255.255.255.0.
    4. Click OK.
    5. Go to Firewall & Objects > Address and create an address for internet subnet 168.1.0.
  2. Register FortiGate for FortiCare Support.

To add or download a Mobile token on FortiGate, FortiGate must be registered for FortiCare Support. If your FortiGate is registered, skip this step. a. Go to Dashboard > Licenses.

  1. Hover the pointer on FortiCare Support to check if FortiCare registered. If not, click it and select Register.
  2. Add FortiToken Mobile to FortiGate.

If your FortiGate has FortiToken installed, skip this step.

  1. Go to User& Device > FortiTokens and click Create New.
  2. Select Mobile Token and type in Activation Code.
  3. Every FortiGate has two free Mobile Tokens. Go to User& Device > FortiTokens and click Import Free Trial Tokens.
  1. Enable FortiToken Mobile Push.

To use FTM-push authentication, use CLI to enable FTM-Push in the FortiGate.

  1. Ensure server-ip is reachable from the Internet and enter the following CLI commands:

config system ftm-push set server-ip 172.20.120.123 set status enable

end

  1. Go to Network > Interfaces.
  2. Edit the wan1
  3. Under Administrative Access > IPv4, select FTM.
  4. Click OK.
  1. Configure user and user group.
    1. Go to User& Device > UserDefinition to create a local user sslvpnuser1.
    2. Enter the user’s Email Address.
    3. Enable Two-factorAuthentication and select one Mobile token from the list,
    4. Enable Send Activation Code from Email.
    5. Click Next and click Submit.
    6. Go to User& Device > UserGroups to create a group sslvpngroup with the member sslvpnuser1.
  2. Activate the Mobile token.
    1. When the user sslvpnuser1 is created, an email is sent to the user’s email address. Follow the instructions to install your FortiToken Mobile application on your device and activate your token.
  3. Configure SSL VPN web portal.
    1. Go to VPN > SSL-VPN Portals to edit the full-access

This portal supports both web and tunnel mode.

  1. Disable Enable Split Tunneling so that all SSL VPN traffic goes through the FortiGate.
  1. Configure SSL VPN settings.
    1. Go to VPN > SSL-VPN Settings.
    2. Choose proper Listen on Interface, in this example, wan1.
    3. Listen on Port 10443.
    4. Set ServerCertificate to the authentication certificate.
    5. Under Authentication/Portal Mapping, set default Portal web-access for All OtherUsers/Groups.
    6. Create new Authentication/Portal Mapping for group sslvpngroup mapping portal full-access.
  2. Configure SSL VPN firewall policy.
    1. Go to Policy & Objects > IPv4 Policy.
    2. Fill in the firewall policy name. In this example: sslvpn certificate auth.
    3. Incoming interface must be SSL-VPN tunnel interface(ssl.root).
    4. Set the Source Address to all and Source User to sslvpngroup.
    5. Set the Outgoing Interface to the local network interface so that the remote user can access the internal network. In this example: port1.
    6. Set Destination Address to the internal protected subnet 168.1.0.
    7. Set schedule to always, service to ALL, and Action to Accept.
    8. Enable NAT.
    9. Configure any remaining firewall and security options as desired.
    10. Click OK.

To configure SSL VPN using the CLI:

  1. Configure the interface and firewall address.

config system interface edit “wan1” set vdom “root”

set ip 172.20.120.123 255.255.255.0

next end

Configure internal interface and protected subnet. Connect Port1 interface to internal network.

config system interface edit “port1” set vdom “root”

set ip 192.168.1.99 255.255.255.0

next

end

config firewall address edit “192.168.1.0” set subnet192.168.1.0 255.255.255.0

next

end

  1. Register FortiGate for FortiCare Support.

To add or download a Mobile token on FortiGate, FortiGate must be registered for FortiCare Support. If your FortiGate is registered, skip this step.

diagnose forticare direct-registration product-registration -a “your account@xxx.com” -p

“your password” -T “Your Country/Region” -R “Your Reseller” -e 1

  1. Add FortiToken Mobile to FortiGate.
    1. If your FortiGate has FortiToken installed, skip this step. execute fortitoken-mobile import <your FTM code>
    2. Every FortiGate has two free Mobile Tokens. You can download the free token.

execute fortitoken-mobile import 0000-0000-0000-0000-0000

  1. Enable FortiToken Mobile Push.
    1. To use FTM-push authentication, ensure server-ip is reachable from the Internet and enable FTM-Push in the FortiGate.

config system ftm-push set server-ip 172.20.120.123 set status enable

end

  1. Enable FTM service on WAN interface.

config system interface edit “wan1” append allowaccess ftm

next

end

  1. Configure user and user group.

config user local edit “sslvpnuser1” set type password set two-factor fortitoken

set fortitoken <select mobile token for the option list> set email-to <user’s email address> set passwd <user’s password>

next

end config user group edit “sslvpngroup” set member “sslvpnuser1”

next

end

  1. Activate the Mobile token.
  2. When the user sslvpnuser1 is created, an email is sent to the user’s email address. Follow the instructions to install your FortiToken Mobile application on your device and activate your token.
  3. Configure SSL VPN web portal.

config vpn ssl web portal edit “full-access” set tunnel-mode enable set web-mode enable set ip-pools “SSLVPN_TUNNEL_ADDR1” set split-tunneling disable

next

end

  1. Configure SSL VPN settings.

config vpn ssl settings set servercert “server_certificate” set tunnel-ip-pools “SSLVPN_TUNNEL_ADDR1” set source-interface “wan1” set source-address “all” set default-portal “web-access” config authentication-rule edit 1 set groups “sslvpngroup” set portal “full-access”

next

end

  1. Configure SSL VPN firewall policy.

Configure one firewall policy to allow remote user to access the internal network.

config firewall policy edit 1 set name “sslvpn web mode access”

set srcintf “ssl.root” set dstintf “port1” set srcaddr “all” set dstaddr “192.168.1.0” set groups “sslvpngroup” set action accept set schedule “always” set service “ALL” set nat enable

next

end

To see the results of web portal:

  1. From a remote device, open a web browser and log into the SSL VPN web portal http://172.20.120.123:10443.
  2. Log in using the sslvpnuser1

The FortiGate pushes a login request notification through the FortiToken Mobile application.

  1. Check your mobile device and select Approve.

When the authentication is approved, sslvpnuser1 is logged into the SSL VPN portal.

  1. On the FortiGate, go to Monitor> SSL-VPN Monitor to confirm the user connection.

To see the results of tunnel connection:

  1. Download FortiClient from forticlient.com.
  2. Open the FortiClient Console and go to Remote Access > Configure VPN.
  3. Add a new connection.
    • Set the connection name.
    • Set Remote Gateway to the IP of the listening FortiGate interface, in this example: 20.120.123.
  4. Select Customize Port and set it to 10443.
  5. Save your settings.
  6. Log in using the sslvpnuser1 credentials and click FTM Push.

The FortiGate pushes a login request notification through the FortiToken Mobile application.

  1. Check your mobile device and select Approve.

When the authentication is approved, sslvpnuser1 is logged into the SSL VPN tunnel.

To check the SSL VPN connection using the GUI:

  1. Go to VPN > Monitor> SSL-VPN Monitor to verify the user’s connection.
  2. Go to Log & Report > Forward Traffic to view the details of the SSL VPN traffic.

To check the web portal login using the CLI:

get vpn ssl monitor SSL VPN Login Users:  
Index User       Auth Type      Timeout      From     HTTP in/out   HTTPS in/out
0        sslvpnuser1          1(1)

SSL VPN sessions:

 229      10.1.100.254 0/0      0/0
Index User       Source IP      Duration

To check the tunnel login using the CLI:

get vpn ssl monitor

SSL VPN Login Users:

      I/O Bytes       Tunnel/Dest IP
Index User       Auth Type      Timeout      From     HTTP in/out   HTTPS in/out
0        sslvpnuser1          1(1)

SSL VPN sessions:

 291      10.1.100.254 0/0      0/0
Index User       Source IP      Duration      I/O Bytes       Tunnel/Dest IP
0        sslvpnuser1          10.1.100.254 9       22099/43228    10.212.134.200
This entry was posted in Administration Guides, FortiGate, FortiOS 6.2 on by .

About Mike

Michael Pruett, CISSP has a wide range of cyber-security and network engineering expertise. The plethora of vendors that resell hardware but have zero engineering knowledge resulting in the wrong hardware or configuration being deployed is a major pet peeve of Michael's. This site was started in an effort to spread information while providing the option of quality consulting services at a much lower price than Fortinet Professional Services. Owns PacketLlama.Com (Fortinet Hardware Sales) and Office Of The CISO, LLC (Cybersecurity consulting firm).

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