Webmaster in a Nutshell, Third Edition

Name

deny

Synopsis

                     deny 
                     from 
                     env
                     =variable
                  

[Within <Directory> or .htaccess]

The deny from env directive sets whether access to a directory should be denied if a specific environment variable exists. Access to the secret directory is denied if the client is using Version 4.0 of the “InternetStar” browser, via a user-agent string:

BrowserMatch ^InternetStar/4.0 ACCESS_DENIED
<Directory /secret>
order deny, allow
deny from env=ACCESS_DENIED
allow from all
</Directory>