Agentless VPN with local user password policy

This is a sample configuration of Agentless VPN for users with passwords that expire after two days. Users are warned after one day about the password expiring. The password policy can be applied to any local user password. The password policy cannot be applied to a user group or a local remote user such as LDAP/RADIUS/TACACS+.

In FortiOS 6.2, users are warned after one day about the password expiring and have one day to renew it. If the password expires, the user cannot renew the password and must contact the administrator for assistance.

In FortiOS 6.0/5.6, users are warned after one day about the password expiring and have to renew it. If the password expires, the user can still renew the password.

Sample 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 Agentless VPN connection is established over the WAN interface.

To configure Agentless VPN using the GUI:

1. Configure the interface and firewall address. The port1 interface connects to the internal network.

   1. Go to Network > Interfaces and edit the wan1 interface.

   2. Set IP/Network Mask to 172.20.120.123/255.255.255.0.

   3. Edit port1 interface and set IP/Network Mask to 192.168.1.99/255.255.255.0.

   4. Click OK.

   5. Go to Policy & Objects > Address and create an address for internet subnet 192.168.1.0.

2. Configure user and user group.

   1. Go to User & Authentication > User Definition to create a local user named agentlessvpnuser1.

   2. Go to User & Authentication > User Groups to create a user group named agentlessvpngroup, and add that local user to it.

3. Configure and assign the password policy using the CLI.

   1. Configure a password policy that includes an expiry date and warning time. The default start time for the password is the time the user was created.

      config user password-policy
          edit "pwpolicy1"
              set expire-days 2
              set warn-days 1
          next
      end

   2. Assign the password policy to the user you just created.

      config user local
          edit "agentlessvpnuser1"
              set type password
              set passwd-policy "pwpolicy1"
          next
      end

4. Configure Agentless VPN portals.

   1. Go to VPN > Agentless VPN Portals, and click Create New.

   2. Enter a name, such as agentless-portal.

   3. Under Predefined Bookmarks, click Create New, and enter the following details:

      Field	Value
      Name	Windows Server
      Type	RDP
      Host	192.168.1.114
      Port	3389
      Single Sign-On	Disable
      Username	Set the username to log in to Windows Server.
      Password	Set the password to log in to Windows Server.
      Port	3389

   4. Click OK to save the predefined bookmark.

   5. Click OK to save the portal settings.

   6. Create another Agentless VPN portal and name it portal-access-disabled.

   7. Click OK to save the portal settings.

   8. Disable Agentless VPN for the newly created portal (that is, portal-access-disabled) using CLI:

      config vpn ssl web portal
          edit "portal-access-disabled"
              set web-mode disable
          next
      end

5. Configure Agentless VPN settings.

   1. Set Agentless VPN to Enable.

   2. Set the Listen on Interface(s) to wan1.

   3. Set Listen on Port to 10443.

   4. Choose a certificate for Server Certificate. The default is Fortinet_Factory.

   5. In Authentication/Portal Mapping, select All Other Users/Groups, and click Edit.

   6. Use Portal dropdown to select portal-access-disabled.

   7. Click OK.

   8. In Authentication/Portal Mapping, click Create New.

      1. Set Users/Groups to agentlessvpngroup.

      2. Set Portal to agentless-portal.

      3. Click OK.

   9. Click Apply to save the Agentless VPN settings.

6. Configure Agentless VPN firewall policy.

   1. Go to Policy & Objects > Firewall Policy and click Create New.

   2. Set Name as Agentless VPN firewall policy.

   3. Set Schedule to always and Action to Accept.

   4. Set Incoming Interface to Agentless VPN tunnel interface(ssl.root).

   5. Choose an Outgoing Interface. This example uses port1.

   6. Set Source to all and User/group to agentlessvpngroup.

   7. In this example, the Destination is the internal, protected subnet 192.168.10.0.

   8. Set Service to ALL.

   9. Click OK.

To configure Agentless 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

2. Configure internal interface and protected subnet, then connect the port1 interface to the 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 subnet 192.168.1.0 255.255.255.0
       next
   end

3. Configure user and user group.

   config user local
       edit "agentlessvpnuser1" 
           set type password
           set passwd your-password
       next 
   end
   config user group
       edit "agentlessvpngroup" 
           set member "agentlessvpnuser1"
       next 
   end

4. Configure and assign the password policy.

   1. Configure a password policy that includes an expiry date and warning time. The default start time for the password is the time the user was created.

      config user password-policy
          edit "pwpolicy1"
              set expire-days 2
              set warn-days 1
          next
      end

   2. Assign the password policy to the user you just created.

      config user local
          edit "sslvpnuser1"
              set type password
              set passwd-policy "pwpolicy1"
          next
      end

5. Configure Agentless VPN portal and predefine RDP bookmark for windows server.

   config vpn ssl web portal
       edit "agentless-portal"
           set web-mode enable
           config bookmark-group
               edit "gui-bookmarks"
                   config bookmarks
                       edit "Windows Server"
                           set apptype rdp
                           set host "192.168.1.114"
                           set port 3389
                           set logon-user "your-windows-server-user-name"
                           set logon-password your-windows-server-password
                       next
                   end
               next
           end
       next
   end

6. Configure another Agentless VPN portal and disable Agentless VPN on it.

   config vpn ssl web portal
       edit "portal-access-disabled"
           set web-mode disable
       next
   end

7. Apply the user group to the Agentless VPN portal.

   config vpn ssl settings
       set servercert "Fortinet_Factory"
       set source-interface "wan1"
       set source-address "all"
       set default-portal "portal-access-disabled"
       config authentication-rule
           edit 1
               set groups "agentlessvpngroup"
               set portal "agentless-portal"
           next        
       end
   end

8. Configure one Agentless VPN firewall policy to allow remote user to access the internal network. This policy does not allow traffic initiated from internal network to remote client.

   config firewall policy 
       edit 1
           set name "Agentless VPN firewall policy"
           set srcintf "ssl.root"
           set dstintf "port1"
           set action accept
           set srcaddr "all"
           set dstaddr "192.168.1.0"
           set schedule "always"
           set service "ALL"
           set nat enable
           set groups "LDAP-USERGRP"
       next
   end

To see the results of web portal:

1. From a remote device, use a web browser to log into the Agentless VPN web portal http://172.20.120.123:10443.

2. Log in using the agentlessvpnuser1 credentials.

   When the warning time is reached, the user is prompted to enter a new password.

   In FortiOS 6.2, when the password expires, the user cannot renew the password and must contact the administrator.

   In FortiOS 6.0/5.6, when the password expires, the user can still renew the password.

To check the Agentless VPN connection using the GUI:

1. On FortiGate, go to Dashboard > Agentless VPN Monitor to verify the list of Agentless VPN users.

   If the Agentless VPN Monitor is hidden, click + under the Dashboard, search for Agentless VPN Monitor, and add it to the display.

2. Go to Log & Report > System Events, and use the dropdown to select VPN Events to view VPN logs.

To check that login failed due to password expired on GUI:

1. Go to Log & Report > System Events and select the VPN Events card to see the Agentless VPN alert labeled ssl-login-fail.

2. Click Details to see the log details about the Reasonsslvpn_login_password_expired.

To check the Agentless web portal login using the CLI:

get vpn ssl monitor
Agentless VPN Login Users:
 Index   User         Auth Type   Timeout    From           HTTP in/out   HTTPS in/out
 0       agentlessvpnuser1  1(1)        229        10.1.100.254   0/0           0/0

Agentless VPN sessions:
 Index   User    Source IP      Duration        I/O Bytes       Tunnel/Dest IP 

To check the FortiOS login password expired event log:

FG201E4Q17901354 # execute log  filter category event

FG201E4Q17901354 # execute log  filter field subtype vpn

FG201E4Q17901354 # execute log  filter field action ssl-login-fail

FG201E4Q17901354 # execute log  display 
1: date=2019-02-15 time=10:57:56 logid="0101039426" type="event" subtype="vpn" level="alert" vd="root" eventtime=1550257076 logdesc="SSL VPN login fail" action="ssl-login-fail" tunneltype="ssl-web" tunnelid=0 remip=10.1.100.254 user="u1" group="g1" dst_host="N/A" reason="sslvpn_login_password_expired" msg="SSL user failed to logged in"