SIMS - online registers across a router
I've been asked by a school to set up SIMS so that online registers can be taken in classrooms. We currently have a router between the curriculum and admin subnets, with a third interface for Internet access. The router's packet filters only allow traffic to & from the Internet from either subnet, not between the subnets.
I understand that I will need to create a trust between the admin and curriculum domains as a first step to allow staff to access SIMS in the classroom. I guess this will mean allowing Kerberos and DNS across the router as a minimum. I have no idea what additional traffic SIMS will require.
Does anyone know what the minimum requirement will be for ports to open in order to get this working? Also, it would be good to be able to differentiate between client-server and server-server traffic.
Thanks in advance