Site Settings Display A Blank Page

When you use standard hostname given to the address of the loopback network interface, “localhost”, as URL to access the SharePoint Site Settings page of any sub sites for example: http://localhost/subsite1/_layouts/settings.aspx, a blank page will be displayed and the following entries will be logged in the SharePoint ULS:

• 01/29/2011 18:43:04.10 | w3wp.exe | (0x1CB4) | 0x1DDC | SharePoint Foundation | Logging Correlation Data | Name=Request (GET:http://<<SERVERNAME>>:80/<<SUBSITE>>/_layouts/settings.aspx)
• 01/29/2011 18:43:04.11 | w3wp.exe | (0x1CB4) | 0x1DDC | SharePoint Foundation | Monitoring | Leaving Monitored Scope (Request (GET:http://<<SERVERNAME>>:80/<<SUBSITE>>/_layouts/settings.aspx)). Execution Time=1.96949915988322
• 01/29/2011 18:43:04.11 | w3wp.exe | (0x1CB4) | 0x1F24 | SharePoint Foundation | Configuration | Alternate access mappings have not been configured.  Users or services are accessing the site http://<<SERVERNAME>> with the URL http://localhost.  This may cause incorrect links to be stored or returned to users.  If this is expected, add the URL http://localhost as an AAM response URL.  For more information, see: http://go.microsoft.com/fwlink/?LinkId=114854"/>    

To fix this issue, all you need to do is to configure Alternate Access Mappings (AAM) by adding internal URLs “http://localhost” to the default zone as shown in screenshot below: