NAT/Route mode installation

Destination based routing examples

 

 

3Select 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

4Select 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.

5Change 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

1Add 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

1Add 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

2Add 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.

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

 

 

 

 

 

 

FortiGate-100 Installation and Configuration Guide

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Page 53
Image 53
Fortinet 100 user manual Adding the routes using the CLI, Routing table should have routes arranged as shown in Table