4.5. My entire home directory is in HTML document space.
If working with an ISP where all of the files are in HTML document space, disable all access to the Interchange catalog directory with the proper HTTP access restrictions. Normally that is done by creating a .htaccess file like this:
<Limit GET POST> order allow,deny deny from all </Limit>
If unable to do this, do not run Interchange unless file permissions can be set such that files will not be served. However, security will be a problem and customers' personal information could be placed at risk.