Configuring and implemting firewall on a solaris router/gateway

Hello!
I need to know, how do we implement, or make a firewall on a System that is behaving a router between different networks and Solaris 9 installed.
Please if possible, either recommend me some available sources, or tell me the location of file, deamons associated, and syntax of the file to be prepared for IP filtering.
Note:
What I want to do is that I have installed DHCP on this router. I have reserved all the IP's on the subnets/networks with the MAC addresses of the NICs. Now I want that only the IP's / MACs specified in the DHCP should be able to route through the network, and not any other possible IPs, not listed in DHCP.
I would be grate ful, if someone helps me out

Try http://solaris-x86.org/security/ which has two articles on armoring Solaris for firewall purposes.
Gerald

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