Currently I had a Windows Server 2008 R2 running in Hyper-V, previously it still able to access any kind of website with domain name. Recently, it failed to do that any more, and I found out that I can still access website with IP address, but not domain name, and once I tried manually configure the hosts file (located in system32/drivers/etc/), the domain name works again. I also tried flushdns, restart server, restart router, restart anything that I could.
Anyone know how to resolve this?
FIY: The server is a file server and deployment server, mainly for users logged in for building deployment and testing purpose. It does not have DNS server roles.