Linux Firewall, communication between computers in different subnets connected to same switch & static route

[Digen N <digennaik@xxxxxxxxx>]

            *****************************
           * Internet Modem/Router *
           *    192.168.1.1              *
           ******************************
                     *
                     *
                     *  192.168.1.2(eth0)
           *************************
           *    Linux Firewall     *
           *************************
                    *   192.168.2.1(eth1) , 192.168.3.1(eth1:0 -
Virtual Interface)
                    *
                    *
                    *
           *************************       ***********
           *        Switch         * * * * * Router  **********
192.168.0.x network.
           *************************       ***********
           *                      *        10.0.0.200
           *                      *
           *                      *
           *                      *
           *                      *
         * * * *                * * * *
         * PC *             * PC  *
         * * * *                * * * *

    IP:192.168.2.10          IP: 192.168.3.10
  Gateway: 192.168.2.1      Gateway: 192.168.3.1

I need to be able to achieve couple of things,

The computers in the 192.168.2.0/24 network and the computers in the
192.168.3.0/24 network should be able to communicate with each other
i.e ping, ssh, share files etc.

I need a static route setup so that and data going to 192.168.0.x
range is redirected to the router on 10.0.0.200.

Any pointers to documentation/guides for carrying out the above two
requirements will be much appreciated.
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