How to define multiple subnets as internal networks

[LotfiDZ]

Hello,
I am deploying pfSense VM in our corporate network which is composed of about 20 subnets (DMZ, remote sites, servers, computers...) considered as internal networks and a DMZ for web server.
I started by installing pfSense in a virtual machine containing three network cards: LAN, WAN, DMZ.
The problem is, my network is composed of many subnets, it's like the pfsense firewall is behind a firewall and needs to reach those networks.
I would like to know now how can i define static routes for my networks from pfSense.?
Thank you.

[JKnott]

It's done under System>Routing. Of course, you'll need to have the interfaces, including VLANs if used, configured properly.

[LotfiDZ]

Hello,
As i understand, i should create under System>Routing, static routes to my internal networks. right?
Thank you.

[stephenw10]

You may not need interfaces for each subnet unless you're routing between them in pfSense.

You will need whatever the upstream router is configured as a gateway in pfSense to add the static routes to.

Steve