... Directives | ... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > How-To / Tutorials . ... Access control refers to any means of controlling access to any resource. ... If you wish to restrict access to portions of your site based on the host address of your visitors, this is most easily done using mod_authz_host . The Allow and Deny directives let you allow and deny access based on the host name, or host address, of the machine requesting a document. ...