user traffic control

config router static edit 0 set device <wan port> set gateway <ip address of the gateway of that wan port you selected above> set destination (0.0.0.0/.0.0.0.0 for everything or de subnet you want ot be accessed from this wan link) end

OR config router policy edit 0 set input-device <source interface> set src <ip or netmask of the source of the traffic you want to route> set output-device <wan port> set dst <ip or netmask of the source of the traffic you want to route> 0.0.0.0/.0.0.0.0 for everything set gateway <ip address of the gateway of that wan port you selected above> set action permit

end

See that with router policy you can define the source too, not only the destination.

Hope it helps,

tioeudes

you can check out policy route  option in network just below static route & select the wan port on which you want to divert traffic on.(am assuming you have basic knowledge about fortigate) Vishal