I have an SBS2003 server with 10 client pcs.
Just recently I have added a 4 new forward lookup zones in the DNS configuration. This seems to have caused the client pcs internet connection to slow quite dramatically; either internet requests timeout or the pages (such as yahoo or google) take up to 30 seconds to load. However there are times when the internet is running well which I presume is due to caching either on the server or the clients.
The server has the following services running: iis, dns, exchange & sql but does not have IAS. I plugged the internet connection directly into a laptop and it works very well.
Does anybody have any suggestions for solving this problem?
I have searched the internet without much luck. Is there a way to boost the DNS priority on the server to improve it's response time?