Hi to all: I need to setup a cluster with 2 servers using Windows Server 2003 Enterprise Edition for fault tolerance and availability. Environment: Since these two servers (Server1 and Server2) will be the only ones in the company they will both be domain controllers and DNS Servers as well. I am currently doing some testing at home. I have three PCs (Server1, Server2, and Client1) I want to configure the whole thing before the "Real Deal". Server1 is the first node in the cluster, and Server2 will be inactive. So If Server1 fails it will "failover" Server2. CNFinancialgroup.com is already registered and hosted by an external company. We are not planning on hosting our own web site. The Local Domain Name that will be used on the network will be CNFinancialGroup.local or maybe .net They will have a public IP address (or static IP address) At home, Server1 is already configured with Active Directory, and DNS server was configured through the DNS Wizard that was launched when Promoting Server1 to a Domain Controller. DNS on Server1 has two Forward lookup zones: CNFinancialGroup.local and _msdcs.CNFinancialGroup.local (What are these two?); and one Reverse Lookup Zone 192.168.1.x Subnet (Created manually). They are Active Directory integrated Zones PROBLEMS: 1) I want to make sure that DNS on Server1 is configured correctly. I can browse the internet without problem. and enter \\client1 in RUN menu and it works fine. Does this means DNS is working fine?.. Should I add/change something? I read about stub zones and I think it applies to my situation, since the local domain name "CNFinancialGroup.local" is not register. 2) How Should I configured DNS on Server2? DNS on Server2 must work when Server1 is down completely. I have not configured Primary Zones nor Secondary Zones on neither of the Servers. I think this is ok, since DNS are active directory integrated zones. When I added Active Directory role in Server2 it does not launch DNS wizard becase it uses the DNS server on Server1. Thanks a lot for any input on this!