We have a LAN and the router is the DHCP server. We have a server with Windows SBS 2008, it has the IP address 192.168.1.2 while the router has the IP address 192.168.1.1.
I have tried to add a client computer to the SBS domain by visiting http://connect from the client computer. But that page doesn't exist. I can visit http://192.168.1.2/ then the default startpage for IIS7 is shown. I'm logged in as a local Administrator on the computer that I tries to add to the domain.
How do I add the client computer to the SBS 2008 domain?
UPDATE: I have now set the Windows SBS 2008 as DHCP Server. I can connect to http://connect/ on an Windows XP client, but I have problem with a Windows Vista client, it can not connect to http://connect/ and I have tried to renew the IP address and flush the DNS Cash with ipconfig /flushdns but it doesn't help.
How can I solve this?
You should really use SBS2008 as your DHCP server, as gravyface noted in his comment. Regardless though, you also need to ensure that the clients are pointed to DNS on the SBS2008 box directly. You could either modify DHCP settings on the router or (preferred) switch to using the DHCP on the server which will likely already be configured for you.
You should specify the domain name in your DHCP server as well. Otherwise, the connect URL isn't going to resolve properly.
First, set the SBS server as the DHCP server for the clients. This isn't required but it's recommended. Make sure to set up and activate a valid scope with the appropriate options.
Second, on the workstation in question, set the "DNS suffix for this connection" field on the DNS tab of the Advanced TCP/IP properties for the NIC to the SBS domain name. Make sure the client is configured to use the SBS server for DNS. When the client tries to resolve the name "connect" it won't work unless the client appends the SBS domain name to it's query for the name "connect". I've run in to this on every SBS2008 install I've done.