I have recently set up my network at my new office using a new Windows Server 2008 r2. Everything is working well, apart from the clients internet access is slow. Some website display a page cannot be found message and then when the page is refreshed the website is loaded. The clients web access is generally slow.
I have a Windows Server 2008 which has 2 NICS (one LAN and one WAN). The WAN NIC is connected to my Draytek router which is connected to the internet. All client computer use the server as a DC, DNS and gateway. To service the clients with internet the server is running Routing and Remote Access.
The internet access on the server itself is very fast.
Any help would be greatly appreciated.