We have seen some new installations of NFA 9.1.x where after the installation completes and you try to load the URL to log in like http:\\localhost\ra it redirects to what looks like a directory listing instead of the NFA Login page.
A new technical document has been published for this problem on Support.ca.com at the link below to address the IIS configuration changes that need to be made.
https://comm.support.ca.com/?legacyid=TEC595777
The solution is also listed below:
1)Test by manually adding 'default.aspx' to the URL it should load the web page, like below:
http://localhost/ra/default.aspx
2)If this works, then it means that the "Default Web Site" in IIS does not have 'default.aspx' listed as a "Default Document"
3)To correct this open IIS and go to the "Default Web Site", in the "Features View" double click "Default Document"
4)This will bring you to the screen below which will allow you to click "Add" on the right hand side of the screen.
Then just manually type in "default.aspx"
5)Test the URL to the NFA page again and you should now be directed to either the login page or directly to the NFA website depending on your SSO settings.