Re: Fortigate 300D - 2 WAN link to setup for 2 different networks
As there can only be ONE default route per system / per FGT / per VDOM, and you need 2 of these for 2 WANs, the only way to do this is to apply a Policy route for one of them.
For the students, set up a default route pointing to WAN1. Done.
For the staff, create a policy route pointing to WAN2. A PR allows to decide which way to go not only by the destination address like an ordinary route, but by matching source address, source port and other fields. In your case, the PR would match the staff's subnet and redirect traffic away from the default route, out to WAN2.
Of course, you will need policies to finally allow the traffic. Both internet facing policies need to have NAT enabled.
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