I have a Windows 2003 server with several additional IP addresses added int he advanced section. Since a Windows update these stop working after a few minutes. They are required by IIS and as a result the websites stop working. The main IP on the box continues to work OK. Only the additional IP addresses fail.. This could be an 'arp' issue
Currently supporting a windows 2003 network with multiple sites throughout the USA. I can troubleshoot and deliver a solution, not a workaround to your issue. It would be an honor to assist you.