I will soon be implementing a Firewall in my network. Currently I have 2 separate networks, both are all static IP (internal), each network has their own external IP and Router. With the new Firewall, I will eliminate the two routers and separate the networks through IP Subnetting. Both networks currently have an internal IP convention of 192.168.1.xxx. In order for the Firewall to separate the networks properly, one of the networks will need to change to 192.168.2.xxx. This is the network I have questions about.
I have a server running Windows Server 2008 R2 Standard. My biggest concern is to make sure the DNS is properly changed from 1.xxx to 2.xxx. Changing the IP's on all the clients and printers should be easy enough. I also have a Netgear GS748Tv4 Switch that also has an IP address that will need to be changed.
I will be changing the network over on the router first so that (hopefully) the Firewall will be just a plug and play install (since it is already pre-programmed).
Is there some sort of procedure to properly change the IP address of the DNS? Would I need to use the command [ipconfig /flushdns] on the server? On all the clients? I just don't want to miss anything and have my network crash when everybody is in it the next day (approx. 40 endpoints).
Also, in what order should I change the IP's? (i.e. Router 1st, Server 2nd, Switch 3rd, etc.)
Thank you in advance.