.htaccess

Options -Indexes 
ErrorDocument 404 /404.php

<IfModule mod_php5.c>
  php_flag session.use_trans_sid off
  php_value display_errors 1
  php_value mbstring.internal_encoding UTF-8
</IfModule>

<IfModule mod_rewrite.c>
  Options +FollowSymLinks
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-l
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !/bitrix/urlrewrite.php$
  RewriteRule ^(.*)$ /bitrix/urlrewrite.php [L]
  RewriteRule .* - [E=REMOTE_USER:%{HTTP:Authorization}]
</IfModule>

<IfModule mod_dir.c>
  DirectoryIndex index.php index.html
</IfModule>

<IfModule mod_expires.c>
  ExpiresActive on
  ExpiresByType image/jpeg "access plus 3 day"
  ExpiresByType image/gif "access plus 3 day"
  ExpiresByType image/png "access plus 3 day"
  ExpiresByType text/css "access plus 3 day"
  ExpiresByType application/javascript "access plus 3 day"  
</IfModule>

Немного модифицированный:

Options -Indexes 
ErrorDocument 404 /404.php

<IfModule mod_php5.c>
  php_flag session.use_trans_sid off
  php_value display_errors 1
  php_value mbstring.internal_encoding UTF-8
</IfModule>

<IfModule mod_rewrite.c>
  Options +FollowSymLinks
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-l
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !/bitrix/urlrewrite.php$
  RewriteRule ^(.*)$ /bitrix/urlrewrite.php [L]
  RewriteRule .* - [E=REMOTE_USER:%{HTTP:Authorization}]
</IfModule>

<IfModule mod_dir.c>
  DirectoryIndex index.php index.html
</IfModule>

<IfModule mod_deflate.c>
  AddOutputFilterByType DEFLATE text/html text/plain text/xml application/xml application/xhtml+xml text/css text/javascript application/javascript application/x-javascrip
</IfModule>

<ifModule mod_headers.c>
    <FilesMatch "\.(html|htm)$">
        Header set Cache-Control "max-age=43200"
    </FilesMatch>
    <FilesMatch "\.(js|css|txt)$">
        Header set Cache-Control "max-age=604800"
    </FilesMatch>
    <FilesMatch "\.(flv|swf|ico|gif|jpg|jpeg|png)$">
        Header set Cache-Control "max-age=2592000"
    </FilesMatch>
    <FilesMatch "\.(pl|php|cgi|spl|scgi|fcgi)$">
        Header unset Cache-Control
    </FilesMatch>
</IfModule>

<IfModule mod_gzip.c>
   mod_gzip_on Yes
   mod_gzip_dechunk Yes
   mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$
   mod_gzip_item_include handler ^cgi-script$
   mod_gzip_item_include mime ^text\.*
   mod_gzip_item_include mime ^application/x-javascript.*
   mod_gzip_item_exclude mime ^image\.*
   mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>

<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType image/gif "access plus 3 day"
    ExpiresByType image/jpeg "access plus 3 day"
    ExpiresByType image/png "access plus 3 day"
    ExpiresByType text/css "access plus 3 day"
    ExpiresByType text/javascript "access plus 3 day"
    ExpiresByType application/javascript "access plus 3 day"
    ExpiresByType application/x-javascript "access plus 3 day"
    ExpiresByType image/x-icon "access plus 3 day"
    ExpiresByType image/svg+xml "access plus 3 day"
    ExpiresByType image/vnd.microsoft.icon "access plus 3 day"
    ExpiresByType application/font-woff "access plus 3 day"
    ExpiresByType application/x-font-woff "access plus 3 day"
    ExpiresByType application/vnd.ms-fontobject "access plus 3 day"
    ExpiresByType font/opentype "access plus 3 day"
    ExpiresByType font/ttf "access plus 3 day"
    ExpiresByType font/otf "access plus 3 day"
    ExpiresByType application/x-font-ttf "access plus 3 day"
    ExpiresByType application/x-font-otf "access plus 3 day"
</IfModule>