OSPF set-up with inside and outside /16 network provided by other

[carguello]

Hello,

We are in the process of implementing pfsense for a site we have and requires us to use ospf with a /16 network provided by our provider. That being said we don't have access to open ports or their firewall.

We were told we can set up internal network and provide them with a static routes which they would whitelist or bypass their firewall.

We currently have the following networks set up and some can talk to each other and others cant.

192.168.1.1
192.168.5.1
192.168.6.1
192.168.4.1

If we are using OSPF is there a way to create the following networks and masquerade or bridge to point to their provided 10.57.X.X network? Looking for recommendations. We hope to avoid having to redo our entire network.