Options -Indexes -Multiviews +FollowSymLinks

# Insert mod_deflate filter
SetOutputFilter DEFLATE
# Don't compress images
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ \
no-gzip dont-vary
# Don't compress binaries
SetEnvIfNoCase Request_URI \
\.(?:exe|t?gz|zip|bz2|sit|rar)$ \
no-gzip dont-vary
SetEnvIfNoCase Request_URI \.pdf$ no-gzip dont-vary

# Netscape 4.x has some problems...
BrowserMatch ^Mozilla/4 gzip-only-text/html

# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip

# MSIE masquerades as Netscape, but it is fine
# BrowserMatch \bMSIE !no-gzip !gzip-only-text/html

# NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48
# the above regex won't work. You can use the following
# workaround to get the desired effect:
# BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary

<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 30 days"
ExpiresByType image/x-icon A2592000
ExpiresByType application/x-javascript "access plus 30 days"
ExpiresByType text/css "access plus 60 days"
ExpiresByType image/gif "access plus 30 days"
ExpiresByType image/png "access plus 30 days"
ExpiresByType image/jpeg "access plus 30 days"
ExpiresByType text/plain "access plus 30 days"
ExpiresByType application/x-shockwave-flash A604800
ExpiresByType video/x-flv A604800
ExpiresByType application/pdf A2419200
ExpiresByType text/html "access plus 1 days"
</IfModule>

<IfModule mod_headers.c>
# 3 Month
<FilesMatch "\.(flv|gif|jpg|jpeg|png|ico|swf)$">
    Header set Cache-Control "max-age=7257600, must-revalidate"
</FilesMatch>

# 1 Week
<FilesMatch "\.(js|css|pdf|txt)$">
    Header set Cache-Control "max-age=604800, must-revalidate"
</FilesMatch>

# 1 Day
<FilesMatch "\.htc$">
    Header set Cache-Control "max-age=86400, must-revalidate"
</FilesMatch>

# 10 Minutes
<FilesMatch "\.(html|htm)$">
    Header set Cache-Control "max-age=600, must-revalidate"
</FilesMatch>

# NONE
<FilesMatch "\.(pl|php|cgi|spl)$">
    Header unset Cache-Control
    Header unset Expires
    Header unset Last-Modified
    FileETag None
    Header unset Pragma
</FilesMatch>

<IfModule mod_setenvif.c>
  <IfDefine SSL>
    SetEnvIf User-Agent ".*MSIE.*" \
             nokeepalive ssl-unclean-shutdown \
             downgrade-1.0 force-response-1.0
  </IfDefine>
</IfModule>

Add to your mod_rewrite rules:

# MJ12 Virus Bot
RewriteCond %{HTTP_USER_AGENT} ^MJ12bot/v1\.0\.8.*$
RewriteRule .* - [F]