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52 Fortinet Inc.
Configuration example: Multiple connections to the Internet NAT/Route mode installation
Using the CLI
1 Add a ping server to the external interface.
set system interface external config detectserver 1.1.1.1
gwdetect enable
2 Add a ping server to the DMZ interface.
set system interface dmz config detectserver 2.2.2.1 gwdetect
enable
Destination-based routing examples
This section describes the following destination-based routing examples:
• Primary and backup links to the Internet
• Load sharing
• Load sharing and primary and secondary connections
Primary and backup links to the Internet
Use the following procedure to add a default destination-based route that directs all
outgoing traffic to gateway 1. If gateway 1 fails, all connections are redirected to
gateway 2. Gateway 1 is the primary link to the Internet and gateway 2 is the backup
link.
1 Go to System > Network > Routing Table.
2 Select New.
• Destination IP: 0.0.0.0
• Mask: 0.0.0.0
• Gateway #1: 1.1.1.1
• Gateway #2: 2.2.2.1
• Device #1: external
• Device #2: dmz
•Select OK.
Using the CLI
1 Add the route to the routing table.
set system route number 0 dst 0.0.0.0 0.0.0.0 gw1 1.1.1.1
dev1 external gw2 2.2.2.1 dev2 dmz
Table 13: Route for primary and backup links
Destination IP Mask Gateway #1 Device #1 Gateway #2 Device #2
0.0.0.0 0.0.0.0 1.1.1.1 external 2.2.2.1 dmz