We have a windows 2008 SBS, roughly every couple of days no machine on the network can access sites such as google/msn/bbc etc. Its solved easily by rebooting the DNS on the server, however this obviously should noy happen, can anyone suggest a reason or offer debugging assistance?
We had that exact same problem. The workaround was to add DNS forwarders into DNS on the SBS rather than just using root hints.
While this isn't best practice, we haven't found a better resolution yet.
Is the box fully up to date?