Alias /monitorix /var/lib/monitorix/www
ScriptAlias /monitorix-cgi /var/lib/monitorix/www/cgi

<Directory /var/lib/monitorix/www/cgi/>
        DirectoryIndex monitorix.cgi
        Options ExecCGI
        <IfModule mod_authz_core.c>
                # Apache 2.4
                Require all granted
        </IfModule>
        <IfModule !mod_authz_core.c>
                # Apache 2.2
                Order deny,allow
                Allow from all
        </IfModule>
</Directory>

[Mon Sep 01 06:57:52.995680 2014] [authz_core:error] [pid 17145] [client x.x.x.x:58879] AH01630: client denied by server configuration: /var/lib/monitorix/www
[Mon Sep 01 07:00:10.131166 2014] [authz_core:error] [pid 17145] [client x.x.x.x:58903] AH01630: client denied by server configuration: /var/lib/monitorix/www
[Mon Sep 01 07:00:11.102614 2014] [authz_core:error] [pid 17145] [client x.x.x.x:58903] AH01630: client denied by server configuration: /var/lib/monitorix/www
...