Our internal DNS servers (win2k3 & active directory integrated) are configured as forwarders to our ISP's DNS servers for external name resolution. The client pcs get information about DNS servers from DHCP. When I try to access a site xyz.com from any client machine it comes up with up message "Page cannot be displayed". However, if I use the IP address of our ISP DNS server in the TCP/IP properties of a client machine I can open the page. Any ideas why this is happening and can someone suggest a solution please?