Some Protective Measures For Joomla- block the most common type of exploit `attempts`

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# @package      Joomla
# @copyright    Copyright (C) 2005 - 2012 Open Source Matters. All rights reserved.
# @license      GNU General Public License version 2 or later; see LICENSE.txt
##


## Can be commented out if causes errors, see notes above.
Options +FollowSymLinks

## Mod_rewrite in use.

RewriteEngine On

## Begin - Rewrite rules to block out some common exploits.
# If you experience problems on your site block out the operations listed below
# This attempts to block the most common type of exploit `attempts` to Joomla!
#
# Block out any script trying to base64_encode data within the URL.
RewriteCond %{QUERY_STRING} base64_encode[^(]*([^)]*) [OR]
# Block out any script that includes a <script> tag in URL.
RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL.
RewriteCond %{QUERY_STRING} GLOBALS(=|[|%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL.
 RewriteCond %{QUERY_STRING} _REQUEST(=|[|%[0-9A-Z]{0,2})
# Return 403 Forbidden header and show the content of the root homepage
RewriteRule .* index.php [F]
#
## End - Rewrite rules to block out some common exploits.

## Begin - Custom redirects
#
# If you need to redirect some pages, or set a canonical non-www to
# www redirect (or vice versa), place that code here. Ensure those
# redirects use the correct RewriteRule syntax and the [R=301,L] flags.

# mobile site redirection
RewriteCond %{HTTP_REFERER} !^http://(.*).backuptoweb.co.uk/.*$ [NC]

RewriteCond %{HTTP_USER_AGENT} "android|blackberry|iphone|ipod|iemobile|opera          mobile|palmos|webos|googlebot-mobile" [NC]
RewriteRule ^(.*)$ http://mobile.backuptoweb.co.uk/$1 [L,R=302]

RewriteCond %{HTTP_HOST} ^backuptoweb.co.uk [NC]
RewriteRule ^(.*)$ http://www.backuptoweb.co.uk/$1 [L,R=301]

# index.php to /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9} /.*index.php HTTP/
RewriteRule ^(.*)index.php$ /$1 [R=301,L]
#
## End - Custom redirects

##
# Uncomment following line if your webserver's URL
# is not directly related to physical file paths.
# Update Your Joomla! Directory (just / for root).
##

RewriteBase /

 ## Begin - Joomla! core SEF Section.
 #
  RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
 #

 ## End - Joomla! core SEF Section.