DNS Server

The server needs to have an IP address relative to the internal side of the ADSL Router.

Then once you have installed the DNS service, in the DNS console under the properties of the server goto the forwarders tab, in here you should have your ISP's DNS servers.

The gateway of the server and the workstations should be the internal IP of the router.

The clients DNS server should be the DNS server's IP address.

To configure your server as a gateway, you will either need two network cards, one for the inside subnet, and one for the outside subnet.  Using Microsoft's built-in RRAS role, you can set the server to run NAT, like a firewall.  Make sure that all of your network services, ie DNS/DHCP, are set to use the internal network interface rather than the external.

the server doesn't need to be the gateway it just needs to provide names resolution.

I also want , make this Server a Gateway, so My workstations get internet through myServerIP as Gateway
How can i do this?

Did I misunderstand the question?

No, I am just saying it's not required.  There is no reason to use the server as a gateway when the ADSL router is more than capable of doing this.

True, I would personally set it up exactly as you outlined in your first post.  If he's got AD configured for a different subnet, he'll most likely want to change the LAN interface of the DSL modem to match.

I'm trying demazter...
The ASDL modem is also DHCP, so i realize both (Server and ASDL modem) are resolving names...
So, is supposing i need to make the ASDL modem "Bridge mode"?
So, after doing demazter's... When i hang a workstation to Domain, running DHCP
Server is the one who rules...?

DHCP doesn't resolve names it issues IP addresses.

Disable the DHCP on the router and then you will have to re-activate the DHCP on the Server.

ASDL doesn't have DHCP anymore
I had connected the server to a 24-port switch
port no.1 is connected to the ASDL modem
Server has two NIC's, one is connected to the 24-port switch and the other one to the ASDL modem
i have this configuration at server
Eth local Area connection 1
10.12.0.1
255.255.0.0
no gateway
PPP adapter RAC connection
192.168.234.235
255.255.255.255
Eth local Area connection 2
192.168.1.101
255.255.255.0
192.168.1.254

I have internet, but i cannot make workstations get the dynamic ip from server
and make them out to internet

do i have something wrong?
configuration, or connection or something?

Then, after ....

>>demazter:
>>The server needs to have an IP address relative to the internal side of the ADSL Router.

>>Then once you have installed the DNS service, in the DNS console under the properties of the >>server goto the forwarders tab, in here you should have your ISP's DNS servers.

>>The gateway of the server and the workstations should be the internal IP of the router.

>>The clients DNS server should be the DNS server's IP address.

On my workstation

I change my adapter setting to DHCP mode
I get undefinied network
and
IP: 169.254.196.132
subnet mask: 255.255.0.0

A 169.254..x.y address is an APIPA address.

This means you do not have a DHCP server on your network?

I personal installed DHCP server on Server 10.12.0.1
So, it is not configure right?

Did you configure a scope? And activate the scope? And authorise the server?

mmm, No that i remember
What is these and how i configure it

The scope is already configure but i still cannot do my workstation view internet