Our SharePoint 2010 Enterprise server all of a sudden stopped redirecting to the actual .asx pages of the site when we were navigating to just the server name or foldernames.
When i go to http://spsite/pages/default.aspx the page appears. If i go to http://spsite/ the page does not redirect, and instead shows a 404 error.
Some googling led me to this answer, which worked(!), but I realized there really wasn’t good documentation on how to make the changes for IIS7.x, so here they are:
1. Open IIS Manager (Start > Run > inetmgr)
2. Click on the server node
3. Click “ISAPI and CGI Restrictions”
4. Verify that you have the following web service extensions allowed:
5. If they are not all allowed, right click + add the missing dlls.
Not sure why these weren’t set up before, but this solved the issue for me. Hope it can help someone else!