We're looking at making some changes to our network and was wondering if the setup we've come up with looks like it will work ok or if there are any better ways to do this. I've included network diagram images to help it make a little more sense.
Here is a network diagram of our exisiting network:
Basically we're setup locally with a NT4 Server that acts as a DHCP server and File Server. We're connected via a T1 to a remote location that handles our DNS, Exchange server and some AS400 applications, we also receive internet access from this remote site. We've been having a problem with this remote location managing us a bit more than we'd like, they're only an affiliate of ours but have been using VNC to monitor some of our employees and are blocking websites and email that are necessary for normal business. What I've looked at doing is this:
Setting up our own Window2k3 Domain Controller as well as our own Exchange 2k3 server, getting our own internet access and forwarding only traffic that needs to go through their network to the T1 connection. We have a few people who work here who are employed by the remote company and would need to remain a member of their domain, so I've planned to give them static IP addresses instead of the DHCP that will be used with the new setup.
Is there anything that we're missing or could do better before we begin further planning for the switchover??