Sometimes I am getting the following error
The requested URL could not be retrieved
While trying to retrieve the URL: http://groups.google.com/
The following error was encountered:
Unable to determine IP address from host name for groups.google.com
The dnsserver returned:
Refused: The name server refuses to perform the specified operation.
This means that:
The cache was not able to resolve the hostname presented in the URL. Check if the address is correct.
Your cache administrator is root.
What could be the reason for the above error ?