I have 4 static IPs, I'm wanting to use some of those for specific port forwarding to internal addresses. I can set that up fine. However, I'm not sure how to configure the secondary IPs in the router ...

In my last column, I sang the praises of application-layer proxy firewalls and introduced Balazs Scheidler's Zorp firewall suite, available in both commercial and free-of-charge versions. This column ...