Intranet,Win7,IIS,Virtual Server

I want to host a website in IIS at my computer,which is in the Intranet.Initially I follow this article But the site can only be opened by the intranet computers, and nothing I can do about it for a time.

As the result of Google, may be the firewall cause this problem.So I close the 360 security guard, and 360 Anti-virus.But it still can’t be open.Then continues to Google and baidu,and finally I solve the problem.

There are two key points:
1.The port of the virual server can’t assign to 80.(Chian Unicom block the port)
2.The windows internal firewall also need to close or open a port for you website.