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Keith Pyle

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Why can I not get Internet connection sharing to work with Windows Server 2012 R2?

I have a server on which I have installed Windows Server 2012 R2.

Two NICs. One connected to Internet and one connected to a switch with all my workstations.

Having had my old Small Business Server 2003 to go by, I set up my AD, DC, adapters, DNS, DHCP to match.

I successfully joined all workstations to the new domain and all can log on to server and access files, but no workstation has Internet connection.

I've tried everything I can think of to no avail.

Any suggestions appreciated.
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VB ITS
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Two NICs. One connected to Internet and one connected to a switch with all my workstations.
Is there a particular reason you set up your network this way? Do you intend to install some sort of proxy software on your server?

If not, just plug both server NICs to your switch along with your router.

You'll also need to configure DHCP to hand out the router's IP address as the default gateway if you haven't already done so.
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Keith Pyle

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The DNS server has both the server DNS ip and the router DNS ip address.

I used the two NICs because that was the way it was on the old server.

I tried your suggestion; however, I lost Internet connection on the server until I put the old local line from the switch out of the "local" NIC and into the "Internet" NIC.  Still no access on workstations and the workstations no longer could see the Server 2012.
Can you please post the IP address settings of the following:

Your router
The "local" NIC
The "Internet" NIC
The workstations

Mainly after IP address, default gateway, DNS server settings.
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Keith Pyle

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