file 	\COMPUTING\webAssets\accessControl\accessControlReadme.txt

.htaccess_cern		allow access only from machines at CERN
.htaccess_index		allow directory browsing
.htaccess_Error404	redirect in case of ErrorDocument 404 
                        (example, add the lines to the local .htaccess or 
			soft_link to one of the following .htaccess_xxx_Error404)

Error Codes		Meaning (Apache)
404			File not found
500			script error

CERN webservices
http://cern.ch/WebServices/Help/?kbid=210200

Apache manual (Aleph version)
http://aleph.web.cern.ch/manual/custom-error.html

Index of Apache HTTP Server
http://aleph.web.cern.ch/manual/

Group access can now be controlled for Web access. Groups are defined via the 
"Group manager" accessed from IT's services https://websvc06.cern.ch/winservices/
(same for mail and web).