When you try to connect to the Web through ICS, you receive:
We can't find "xxx.xx.xxx.xx"
where xxx.xx.xxx.xx is the IP address of the web page you were trying to display.
If your request times out regularly, you could increase the timeout in the NameSvrQueryTimeout value name, a REG_DWORD data type, at HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netbt\Parameters.
The default is 1500 milliseconds, using the Decimal Radix. I would start with 10,000 and adjust the number if needed.
You can also adjust the TCPInitialRtt Value Name from the default 3000 milliseconds to 5000 milliseconds, using the Decimal Radix. This TCP/IP REG_DWORD parameter is located at HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<ID for Adapter>.