iis
I have just installed IIS 7.5 Express (via VS 2010 SP1), now the sites in IIS 5.1 won't start.
I think it might be because IIS 7.5 Express is using port 80. I'm trying to change the bindings, however I don't think you can use the IIS7 manager to connect to 7.5 Express.
Any ideas? Or am I barking up the wrong tree?
The problem you are running into is caused by your router not supporting hairpin NAT. A quick search here pulls up some great answers: Unable to outside access service from inside LAN
Basically, your router doesn't know that it needs to convert your request for the external IP to the internal IP of your server. The quickest "fix" is to create an entry in your hosts file.
The 403 is because you haven't configured the site to allow directory browsing. You can do so easily enough:
Make sure Directory Browsing is selected in the list of Roles and Features for IIS. (It is selected by default when you add the IIS role, so you probably have it.)
In IIS Manager, configure the site to allow directory browsing. Open the directory browsing feature for the site:
Then enable the feature:
Once you've enabled directory browsing, visiting the site without specifying a page name will show the directory listing:
Best Answer
You should find this answer helpful.