I have a 130mb file in my cache (Windows 2k SP3) when i to download the file the system stops responding and i get this event log. The Web Proxy service failed to create a network socket because there are no available ports on this computer. ISA server already reset the maximal port number to 65535. Make sure this is the value at HKLM\System\CurrentControlSet\Service\TcpIp\Parameters\MaxUsePort and restart the computer to apply this change I've tried clearing the cache but the problem came back again as soon as the file or any large file is in the cache. Any ideas??