I have a question regarding of how to best implement the solution.
We currently have 2 exchange 2003 nodes in a cluster. Both are not apart of HTTP-RPC topolgy. The domain is based on Windows 2003.
1. Does turning the cluster to back-end have any effects on the cluster? Is there a way that it can cause damage to the cluster (also in case we want to get back to the old configuration).
2. Using the following Microsoft recommended topology.
How can I best isolate (by security means) the Front-End from my internal network and my Back-End cluster? Should I put the Front-End in a VLAN or just use a cross cable between the Front-End and the ISA? What does Microsoft recommend by this sketch?