I was trying to load a test html page from a LAN server that is running Windows 7. I could load the page from the server, but not from machines within the LAN. It took a while to figure out, but it turned ot to be the firewall in Windows 7. Here is what I had to do:
Windows Firewall with Advanced Security ---> Inbound Rules --->
Enable World Wide receive incoming HTTP trafficWeb Services (HTTP Traffic-In)
This was not as easy as I thought it would be...lots of errors.
These links saved me: