Fortinet FortiGate 100 User Manual
Page 53
NAT/Route mode installation
Destination based routing examples
FortiGate-100 Installation and Configuration Guide
53
3
Select New to add a route for connections to the network of ISP1.
• Destination IP: 100.100.100.0
• Mask: 255.255.255.0
• Gateway #1: 1.1.1.1
• Gateway #2: 2.2.2.1
• Device #1: external
• Device #2: dmz
4
Select New to add a route for connections to the network of ISP2.
• Destination IP: 200.200.200.0
• Mask: 255.255.255.0
• Gateway #1: 2.2.2.1
• Gateway #2: 1.1.1.1
• Device #1: external
• Device #2: dmz
• Select OK.
5
Change the order of the routes in the routing table to move the default route below the
other two routes.
• For the default route select Move to
.
• Type a number in the Move to field to move this route to the bottom of the list.
If there are only 3 routes, type 3.
• Select OK.
Adding the routes using the CLI
1
Add the route for connections to the network of ISP2.
set system route number 1 dst 100.100.100.0 255.255.255.0 gw1
1.1.1.1 dev1 external gw2 2.2.2.1 dev2 dmz
1
Add the route for connections to the network of ISP1.
set system route number 2 dst 200.200.200.0 255.255.255.0 gw1
2.2.2.1 dev1 dmz gw2 1.1.1.1 dev2 external
2
Add the default route for primary and backup links to the Internet.
set system route number 3 dst 0.0.0.0 0.0.0.0 gw1 1.1.1.1
dev1 external gw2 2.2.2.1 dev2 dmz
The routing table should have routes arranged as shown in
Table 15: Example combined routing table
Destination IP‘ Mask
Gateway #1
Device #1
Gateway #2
Device #2
100.100.100.0
255.255.255.0
1.1.1.1
external
2.2.2.1
dmz
200.200.200.0
255.255.255.0
2.2.2.1
dmz
1.1.1.1
external
0.0.0.0
0.0.0.0
1.1.1.1
external
2.2.2.1
dmz