NAT mode

In this example, both VDOM-A and VDOM-B use NAT mode. A VDOM link is created that allows users on the internal network to access the FTP server.

This configuration requires the following steps:

1. Configure VDOM-A
2. Configure VDOM-B
3. Configure the VDOM link

Configure VDOM-A

VDOM-A allows connections from devices on the internal network to the Internet. WAN 1 and port 1 are assigned to this VDOM.

The per-VDOM configuration for VDOM-A includes the following:

• A firewall address for the internal network
• A static route to the ISP gateway
• A security policy allowing the internal network to access the Internet

All procedures in this section require you to connect to VDOM-A, either using a global or per-VDOM administrator account.

To add the firewall addresses in the GUI:

1. Go to Policy & Objects > Addresses and create a new address.
2. Enter the following information:

   Name	internal-network
   Type	Subnet
   Subnet / IP Range	192.168.10.0/255.255.255.0
   Interface	port1
   Show in Address List	enabled

To add the firewall addresses with the CLI:

config vdom

edit VDOM-A

config firewall address

edit internal-network

set associated-interface port1

set subnet 192.168.10.0 255.255.255.0

next

end

next

end

To add a default route in the GUI:

1. Go to Network > Static Routes and create a new route.
2. Enter the following information:

   Destination	Subnet
   IP address	0.0.0.0/0.0.0.0
   Gateway	172.20.201.7
   Interface	wan1
   Distance	10

To add a default route with the CLI:

config vdom

edit VDOM-A

config router static

edit 0

set gateway 172.20.201.7

set device wan1

next

end

next

end

To add the security policy in the GUI:

1. Connect to VDOM-A.
2. Go to Policy & Objects > IPv4 Policy and create a new policy.
3. Enter the following information:

   Name	VDOM-A-Internet
   Incoming Interface	port1
   Outgoing Interface	wan1
   Source Address	internal-network
   Destination Address	all
   Schedule	always
   Service	ALL
   Action	ACCEPT
   NAT	enabled

To add the security policy with the CLI:

config vdom

edit VDOM-A

config firewall policy

edit 0

set name VDOM-A-Internet

set srcintf port1

set dstintf wan1

set srcaddr internal-network

set dstaddr all

set action accept

set schedule always

set service ALL

set nat enable

next

end

next

end

Configure VDOM-B

VDOM-B allows external connections to reach an internal FTP server. WAN 2 and port 2 are assigned to this VDOM.

The per-VDOM configuration for VDOM-B includes the following:

• A firewall address for the FTP server
• A virtual IP address for the FTP server
• A static route to the ISP gateway
• A security policy allowing external traffic to reach the FTP server

All procedures in this section require you to connect to VDOM-B, either using a global or per-VDOM administrator account.

To add the firewall addresses in the GUI:

1. Go to Policy & Objects > Addresses and create a new address.
2. Enter the following information:

   Address Name	FTP-server
   Type	Subnet
   Subnet / IP Range	192.168.20.10/32
   Interface	port2
   Show in Address List	enabled

To add the firewall addresses with the CLI:

config vdom

edit VDOM-B

config firewall address

edit FTP-server

set associated-interface port2

set subnet 192.168.20.10 255.255.255.255

next

end

next

end

To add the virtual IP address in the GUI:

1. Go to Policy & Objects > Virtual IPs and create a new virtual IP address.
2. Enter the following information:

   Name	FTP-server-VIP
   Interface	wan2
   External IP Address/Range	172.25.177.42
   Internal IP Address/Range	192.168.20.10

To add the virtual IP address with the CLI:

config firewall vip

edit FTP-server-VIP

set extip 172.25.177.42

set extintf wan2

set mappedip 192.168.20.10

next

end

To add a default route in the GUI:

1. Go to Network > Static Routes and create a new route.
2. Enter the following information:

   Destination	Subnet
   IP address	0.0.0.0/0.0.0.0
   Gateway	172.20.10.10
   Interface	wan2
   Distance	10

To add a default route with the CLI:

config vdom

edit VDOM-B

config router static

edit 0

set device wan2

set gateway 172.20.10.10

next

end

next

end

To add the security policy in the GUI:

1. Go to Policy & Objects > IPv4 Policy and create a new policy.
2. Enter the following information:

   Name	Access-server
   Incoming Interface	wan2
   Outgoing Interface	port2
   Source Address	all
   Destination Address	FTP-server-VIP
   Schedule	always
   Service	FTP
   Action	ACCEPT
   NAT	enabled

To add the security policy with the CLI:

config vdom

edit VDOM-B

config firewall policy

edit 0

set name Access-server

set srcintf wan2

set dstintf port2

set srcaddr all

set dstaddr FTP-server-VIP

set action accept

set schedule always

set service FTP

set nat enable

next

end

next

end

Configure the VDOM link

The VDOM link allows connections from VDOM-A to VDOM-B. This allows users on the internal network to access the FTP server through the FortiGate.

The configuration for the VDOM link includes the following:

• The VDOM link interface
• Firewall addresses for the FTP server on VDOM-A and for the internal network on VDOM-B
• Static routes for the FTP server on VDOM-A and for the internal network on VDOM-B
• Policies allowing traffic using the VDOM link

All procedures in this section require you to connect to the global VDOM using a global administrator account.

To add the VDOM link in the GUI:

1. Connect to root.
2. Go to Global > Network > Interfaces and select Create New > VDOM link.
3. Enter the following information:

   Name		VDOM-link
   Interface 0
   	Virtual Domain	VDOM-A
   	IP/Netmask	0.0.0.0/0.0.0.0
   Interface 1
   	Virtual Domain	VDOM-B
   	IP/Netmask	0.0.0.0/0.0.0.0

To add the VDOM link with the CLI:

config global

config system vdom-link

edit vlink

end

config system interface

edit VDOM-link0

set vdom VDOM-A

set ip 0.0.0.0 0.0.0.0

next

edit VDOM-link1

set vdom VDOM-B

set ip 0.0.0.0 0.0.0.0

next

end

end

To add the firewall address on VDOM-A in the GUI:

1. Connect to VDOM-A.
2. Go to Policy & Objects > Addresses and create a new address.
3. Enter the following information:

   Address Name	FTP-server
   Type	Subnet
   Subnet / IP Range	192.168.20.10/32
   Interface	VDOM-link0
   Show in Address List	enabled
   Static Route Configuration	enabled

To add the firewall addresses on VDOM-A with the CLI:

config vdom

edit VDOM-B

config firewall address

edit FTP-server

set associated-interface VDOM-link0

set allow-routing enable

set subnet 192.168.20.10 255.255.255.255

next

end

next

end

To add the static route on VDOM-A in the GUI:

1. Connect to VDOM-A.
2. Go to Network > Static Routes and create a new route.
3. Enter the following information:

   Destination	Named Address
   Named Address	FTP-server
   Gateway	0.0.0.0
   Interface	VDOM-link0

To add the static route on VDOM-A with the CLI:

config vdom

edit VDOM-A

config router static

edit 0

set device VDOM-link0

set dstaddr FTP-server

next

end

next

end

To add the security policy on VDOM-A in the GUI:

1. Connect to VDOM-A.
2. Go to Policy & Objects > IPv4 Policy and create a new policy.
3. Enter the following information:

   Name	Access-FTP-server
   Incoming Interface	port1
   Outgoing Interface	VDOM-link0
   Source	internal-network
   Destination	FTP-server
   Schedule	always
   Service	FTP
   Action	ACCEPT
   NAT	disabled

To add the security policy on VDOM-A with the CLI:

config vdom

edit VDOM-A

config firewall policy

edit 0

set name Access-FTP-server

set srcintf port1

set dstintf VDOM-link0

set srcaddr internal-network

set dstaddr FTP-server

set action accept

set schedule always

set service FTP

next

end

next

end

To add the firewall address on VDOM-B in the GUI:

1. Connect to VDOM-B.
2. Go to Policy & Objects > Addresses and create a new address.
3. Enter the following information:

   Address Name	internal-network
   Type	Subnet
   Subnet / IP Range	192.168.10.0/24
   Interface	VDOM-link1
   Show in Address List	enabled
   Static Route Configuration	enabled

To add the firewall addresses on VDOM-B with the CLI:

config vdom

edit VDOM-B

config firewall address

edit internal-network

set associated-interface VDOM-link1

set allow-routing enable

set subnet 192.168.10.0 255.255.255.0

next

end

next

end

To add the static route on VDOM-B in the GUI:

1. Connect to VDOM-B.
2. Go to Network > Static Routes and create a new route.
3. Enter the following information:

   Destination	Named Address
   Named Address	internal-network
   Gateway	0.0.0.0
   Interface	VDOM-link1

To add the static route on VDOM-B with the CLI:

config vdom

edit VDOM-B

config router static

edit 0

set device VDOM-link1

set dstaddr internal-network

next

end

next

end

To add the security policy on VDOM-B in the GUI:

1. Connect to VDOM-B.
2. Go to Policy & Objects > IPv4 Policy and create a new policy.
3. Enter the following information:

   Name	Internal-server-access
   Incoming Interface	VDOM-link1
   Outgoing Interface	port2
   Source	internal-network
   Destination	FTP-server
   Schedule	always
   Service	FTP
   Action	ACCEPT
   NAT	disabled

To add the security policy on VDOM-B with the CLI:

config vdom

edit VDOM-B

config firewall policy

edit 0

set name Internal-server-access

set srcintf VDOM-link1

set dstintf port2

set srcaddr internal-network

set dstaddr FTP-server

set action accept

set schedule always

set service FTP

next

end

next

end