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> Chapter 11 - FortiWiFi and FortiAP Configuration Guide > Wireless network examples > A more complex example

A more complex example

This example creates multiple networks and uses custom AP profiles.

Scenario

In this example, Example Co. provides two wireless networks, one for its employees and the other for customers or other guests of its business. Guest users have access only to the Internet, not to the company’s private network. The equipment for these WiFi networks consists of FortiAP-220B units controlled by a FortiGate unit.

The employee network operates in 802.11n mode on both the 2.4GHz and 5GHz bands. Client IP addresses are in the 10.10.120.0/24 subnet, with 10.10.120.1 the IP address of the WAP. The guest network also operates in 802.11n mode, but only on the 2.4GHz band. Client IP addresses are on the 10.10.115.0/24 subnet, with 10.10.115.1 the IP address of the WAP.

On FortiAP-220B units, the 802.11n mode also supports 802.11g and 802.11b clients on the 2.4GHz band and 802.11a clients on the 5GHz band.

The guest network WAP broadcasts its SSID, the employee network WAP does not.

The employees network uses WPA-Enterprise authentication through a FortiGate user group. The guest network features a captive portal. When a guest first tries to connect to the Internet, a login page requests logon credentials. Guests use numbered guest accounts authenticated by RADIUS. The captive portal for the guests includes a disclaimer page.

In this example, the FortiAP units connect to port 3 and are assigned addresses on the 192.168.8.0/24 subnet.

Configuration

To configure these wireless networks, you must:

  • Configure authentication for wireless users
  • Configure the SSIDs (network interfaces)
  • Configure the AP profile
  • Configure the WiFi LAN interface and a DHCP server
  • Configure firewall policies

Configuring authentication for employee wireless users

Employees have user accounts on the FortiGate unit. This example shows creation of one user account, but you can create multiple accounts and add them as members to the user group.

To configure a WiFi user - web-based manager
  1. Go to User & Device > User Definition and select Create New.
  2. Select Local User and then click Next.
  3. Enter a User Name and Password and then click Next.
  4. Click Next.
  5. Make sure that Enable is selected and then click Create.
To configure the user group for employee access - web-based manager
  1. Go to User & Device > User Groups and select Create New.
  2. Enter the following information and then select OK:
Name employee-group
Type Firewall
Members Add users.
To configure a WiFi user and the user group for employee access - CLI

config user user

edit "user01"

set type password

set passwd "asdf12ghjk"

end

config user group

edit "employee-group"

set member "user01"

end

The user authentication setup will be complete when you select the employee-group in the SSID configuration.

Configuring authentication for guest wireless users

Guests are assigned temporary user accounts created on a RADIUS server. The RADIUS server stores each user’s group name in the Fortinet-Group-Name attribute. Wireless users are in the group named “wireless”.

The FortiGate unit must be configured to access the RADIUS server.

To configure the FortiGate unit to access the guest RADIUS server - web-based manager
  1. Go to User & Device > RADIUS Servers and select Create New.
  2. Enter the following information and select OK:
Name guestRADIUS
Primary Server IP/Name 10.11.102.100
Primary Server Secret grikfwpfdfg
Secondary Server IP/Name Optional
Secondary Server Secret Optional
Authentication Scheme Use default, unless server requires otherwise.
Leave other settings at their default values.
To configure the FortiGate unit to access the guest RADIUS server - CLI

config user radius

edit guestRADIUS

set auth-type auto

set server 10.11.102.100

set secret grikfwpfdfg

end

To configure the user group for guest access - web-based manager
  1. Go to User & Device > User Groups and select Create New.
  2. Enter the following information and then select OK:
Name guest-group
Type Firewall
Members Leave empty.
  1. Select Create new.
  2. Enter:
Remote Server Select guestRADIUS.
Groups Select wireless
  1. Select OK.
To configure the user group for guest access - CLI

config user group

edit "guest-group"

set member "guestRADIUS"

config match

edit 0

set server-name "guestRADIUS"

set group-name "wireless"

end

end

The user authentication setup will be complete when you select the guest-group user group in the SSID configuration.

Configuring the SSIDs

First, establish the SSIDs (network interfaces) for the employee and guest networks. This is independent of the number of physical access points that will be deployed. Both networks assign IP addresses using DHCP.

To configure the employee SSID - web-based manager
  1. Go to WiFi & Switch Controller > SSID and select Create New > SSID.
  2. Enter the following information and select OK:
Interface Name example_inc
Traffic Mode Tunnel to Wireless Controller
IP/Netmask 10.10.120.1/24
Administrative Access Ping (to assist with testing)
Enable DHCP Enable
  Address Range 10.10.120.2 - 10.10.120.199
  Netmask 255.255.255.0
  Default Gateway Same As Interface IP
  DNS Server Same as System DNS
SSID example_inc
Security Mode WPA/WPA2-Enterprise
Authentication Select Local, then select employee-group.
Leave other settings at their default values.
To configure the employee SSID - CLI

config wireless-controller vap

edit example_inc

set ssid "example_inc"

set security wpa-enterprise

set auth usergroup

set usergroup employee-group

set schedule always

end

config system interface

edit example_inc

set ip 10.10.120.1 255.255.255.0

end

config system dhcp server

edit 0

set default-gateway 10.10.120.1

set dns-service default

set interface example_inc

config ip-range

edit 1

set end-ip 10.10.120.199

set start-ip 10.10.120.2

end

set lease-time 7200

set netmask 255.255.255.0

end

To configure the example_guest SSID - web-based manager
  1. Go to WiFi & Switch Controller > SSID and select Create New.
  2. Enter the following information and select OK:
Name example_guest
IP/Netmask 10.10.115.1/24
Administrative Access Ping (to assist with testing)
Enable DHCP Enable
  Address Range 10.10.115.2 - 10.10.115.50
  Netmask 255.255.255.0
  Default Gateway Same as Interface IP
  DNS Server Same as System DNS
SSID example_guest
Security Mode Captive Portal
Portal Type Authentication
Authentication Portal Local
User Groups Select guest-group
Leave other settings at their default values.
To configure the example_guest SSID - CLI

config wireless-controller vap

edit example_guest

set ssid "example_guest"

set security captive-portal

set selected-usergroups guest-group

set schedule always

end

config system interface

edit example_guest

set ip 10.10.115.1 255.255.255.0

end

config system dhcp server

edit 0

set default-gateway 10.10.115.1

set dns-service default

set interface "example_guest"

config ip-range

edit 1

set end-ip 10.10.115.50

set start-ip 10.10.115.2

end

set lease-time 7200

set netmask 255.255.255.0

end

Configuring the FortiAP profile

The FortiAP Profile defines the radio settings for the networks. The profile provides access to both Radio 1 (2.4GHz) and Radio 2 (5GHz) for the employee virtual AP, but provides access only to Radio 1 for the guest virtual AP.

To configure the FortiAP Profile - web-based manager
  1. Go to WiFi & Switch Controller > FortiAP Profiles and select Create New.
  2. Enter the following information and select OK:
Name example_AP
Platform FAP220B
Radio 1
  Mode Access Point
  Band 802.11n
  Channel Select 1, 6, and 11.
  Tx Power 100%
  SSID Select SSIDs and select example_inc and example_guest.
Radio 2
  Mode Access Point
  Band 802.11n_5G
  Channel Select all.
  Tx Power 100%
  SSID Select SSIDs and select example_inc.
To configure the AP Profile - CLI

config wireless-controller wtp-profile

edit "example_AP"

config platform

set type 220B

end

config radio-1

set ap-bgscan enable

set band 802.11n

set channel "1" "6" "11"

set vaps "example_inc" "example_guest"

end

config radio-2

set ap-bgscan enable

set band 802.11n-5G

set channel "36" "40" "44" "48" "149" "153" "157" "161" "165"

set vaps "example_inc"

end

Configuring firewall policies

Identity-based firewall policies are needed to enable the WLAN users to access the Internet on Port1. First you create firewall addresses for employee and guest users, then you create the firewall policies.

To create firewall addresses for employee and guest WiFi users
  1. Go to Policy & Objects > Addresses.
  2. Select Create New, enter the following information and select OK.
Address Name employee-wifi-net
Type Subnet / IP Range
Subnet / IP Range 10.10.120.0/24
Interface example_inc
  1. Select Create New, enter the following information and select OK.
Address Name guest-wifi-net
Type Subnet / IP Range
Subnet / IP Range 10.10.115.0/24
Interface example_guest
To create firewall policies for employee WiFi users - web-based manager
  1. Go to Policy & Objects > IPv4 Policy and select Create New.
  2. Enter the following information and select OK:
Incoming Interface example_inc
Source Address employee-wifi-net
Outgoing Interface port1
Destination Address all
Schedule always
Service ALL
Action ACCEPT
NAT Enable NAT
  1. Optionally, select security profile for wireless users.
  2. Select OK.
  3. Repeat steps 1 through 4 but select Internal as the Destination Interface/Zone to provides access to the ExampleCo private network.
To create firewall policies for employee WiFi users - CLI

config firewall policy

edit 0

set srcintf "employee_inc"

set dstintf "port1"

set srcaddr "employee-wifi-net"

set dstaddr "all"

set action accept

set schedule "always"

set service "ANY"

set nat enable

set schedule "always"

set service "ANY"

next

edit 0

set srcintf "employee_inc"

set dstintf "internal"

set srcaddr "employee-wifi-net"

set dstaddr "all"

set action accept

set schedule "always"

set service "ANY"

set nat enable

set schedule "always"

set service "ANY"

end

To create a firewall policy for guest WiFi users - web-based manager
  1. Go to Policy & Objects > IPv4 Policy and select Create New.
  2. Enter the following information and select OK:
Incoming Interface example_guest
Source Address guest-wifi-net
Outgoing Interface port1
Destination Address all
Schedule always
Service ALL
Action ACCEPT
NAT Enable NAT
  1. Optionally, select UTM and set up UTM features for wireless users.
  2. Select OK.
To create a firewall policy for guest WiFi users - CLI

config firewall policy

edit 0

set srcintf "example_guest"

set dstintf "port1"

set srcaddr "guest-wifi-net"

set dstaddr "all"

set action accept

set schedule "always"

set service "ANY"

set nat enable

end

Connecting the FortiAP units

You need to connect each FortiAP-220A unit to the FortiGate unit, wait for it to be recognized, and then assign it to the AP Profile. But first, you must configure the interface to which the FortiAP units connect and the DHCP server that assigns their IP addresses.

In this example, the FortiAP units connect to port 3 and are controlled through IP addresses on the 192.168.8.0/24 network.

To configure the interface for the AP unit - web-based manager
  1. Go to Network > Interfaces and edit the port3 interface.
  2. Set the Addressing mode to Dedicated to Extension Device and set the IP/Netmask to 192.168.8.1/255.255.255.0.
    This step automatically configures a DHCP server for the AP units.
  3. Select OK.
To configure the interface for the AP unit - CLI

config system interface

edit port3

set mode static

set ip 192.168.8.1 255.255.255.0

end

To configure the DHCP server for AP units - CLI

config system dhcp server

edit 0

set interface port3

config ip-range

edit 1

set end-ip 192.168.8.9

set start-ip 192.168.8.2

end

set netmask 255.255.255.0

set vci-match enable

set vci-string "FortiAP"

end

To connect a FortiAP-220A unit - web-based manager
  1. Go to WiFi & Switch Controller > Managed FortiAPs.
  2. Connect the FortiAP unit to port 3.
  3. Periodically select Refresh while waiting for the FortiAP unit to be listed.
    Recognition of the FortiAP unit can take up to two minutes.
    If there is persistent difficulty recognizing FortiAP units, try disabling VCI-Match in the DHCP server settings.
  4. When the FortiAP unit is listed, select the entry to edit it.
    The Edit Managed Access Point window opens.
  5. In State, select Authorize.
  6. In the AP Profile, select [Change] and then select the example_AP profile.
  7. Select OK.
  8. Repeat Steps 2 through 8 for each FortiAP unit.
To connect a FortiAP-220A unit - CLI
  1. Connect the FortiAP unit to port 3.
  2. Enter:

config wireless-controller wtp

 

  1. Wait 30 seconds, then enter get.
    Retry the get command every 15 seconds or so until the unit is listed, like this:

== [ FAP22A3U10600118 ]

wtp-id: FAP22A3U10600118

 

  1. Edit the discovered FortiAP unit like this:

edit FAP22A3U10600118

set admin enable

set wtp-profile example_AP

end

 

  1. Repeat Steps 2 through 4 for each FortiAP unit.