Localhost works but Computer Name does not

When I'm trying to connect to my iis with localhost, everything works fine. When I'm trying to connect with the name of my computer instead of localhost, it doesn't work.

I've found that turning off windows firewall resolves the problem, but I would like to turn on Windows Firewall. So, which program or port should be allowed through the Windows Firewall to make it work?

If you ping to the name of your computer which ip address do you see in the results? Is that the ip address of your network connection? If that is the case, then you probably have to open up port 80 on your windows firewall. (I assume the site(s) on your IIS are running on port 80.) The firewall has to allow incoming traffic on port 80.

Windows Firewall can not get out to your DNS to resolve your computer name back to 127.0.0.1

You can also put the computer name in the c:\windows\system32\drivers\etc\host file along with the 127.0.0.1 address.