Chapter 2 Advanced Routing for FortiOS 5.0 : Advanced Static Routing : Static routing example : Configure FortiGate unit : Configure the external interface (port2)
  
Configure the external interface (port2)
The external interface connects to your ISP’s network. You need to know the IP addresses in their network that you should connect to. Use their addresses when you get them, however for this example we will assume the address your ISP gave you is 172.100.20.20 will connect to the gateway at 172.100.20.5 on their network, and their DNS servers are 172.11.22.33 and 172.11.22.34.
To configure the internal interface (port2) - web based manager
1. Go to System > Network > port2 and select Edit.
2. Enter the following:
Addressing Mode
Manual
IP/Netmask
172.100.20.20/255.255.255.0
Administrative Access
HTTPS, PING, TELNET
Description
Internal network
To configure the internal interface (port2) - CLI
configure system interface
edit port2
set IP 172.100.20.20 255.255.255.0
set allowaccess https ping telnet
set description “internal network”
end
end