Set up multiple levels of anonymous access in Apache
You want to set up a portion of your web site to act like an FTP server — some users should have accounts for downloading, while others should have anonymous downloading access. Still others should be allowed to download one type of file but not another. You don't trust the intelligence of your clientele to handle installing and using an FTP program, so you'd like to make things work within a normal browsing environment.
Using an oft-ignored Apache module included by default, you can allow authenticated anonymous access to certain parts of your site, as well as falling back on normal authentication methods with mod_auth. This becomes handy if you've got a large amount of documents that you don't want indexed by search engines, or you want to create the effect of multiple levels of user power, such as anonymous, privileged, and leech. You want to do it all through a browser and all without additional programming.
The first step is to enable the anon_auth_module , which is normally commented out within the Apache configuration file. To do so, look for the following lines (which may be slightly different in your installation) and remove the #:
#LoadModule anon_auth_module libexec/httpd/mod_auth_anon.so #AddModule mod_auth_anon.c
With the above uncommented and Apache restarted, you can now start adding relevant directives to httpd.conf, or an .htaccess file located in the directory ...