====== Apache ======
==== utils ====
   * vlogger: http://n0rp.chemlab.org/vlogger
   * webalizer: http://www.mrunix.net/webalizer



===== optimization =====
  * **disable DNS Look Up**
  * **MaxClients** ( 512 )
  * **KeepAlive**
     * Disable KeepAlive connections (by setting KeepAlive to Off)
     * Shorten the KeepAliveTimeout value to something like 3 seconds for instances), reducing the maximum simultaneous opened connections to 768
  * **Compress HTTP Content**
  * **Turn off unwanted services** - There are a few services and/or features that you will want to turn off or not allow. All of these services can be disabled in the httpd.conf file. Those services/features that could cause the most issues include:
       * Directory browsing. This is done within a directory tag (the document root is a good place to start) using the Options directive and is set with “-Indexing”.
       * Server side Includes. This is another feature that is disabled within a directory tag (using Options directive) and is set with “-Includes”.
       * CGI execution. Unless your site needs CGI, turn this off. This feature is also set within a directory tag using the Options directive, with “-ExecCGI”.
       * Symbolic links. Set this inside a (surprise, surprise) directory tag with “-FollowSymLinks”.
       * None. You can turn off all options (in the same way you set the above) using “None” with the Option directive.
   * **Disable unused modules**
   * **Restrict access**
<code>
Order Deny, Allow
Deny from all
Allow from 192.168.1.0/16
</code>
   * **Limit request size** - Denial of service attacks are always a possibility when you allow large requests on Apache. Apache has a directive, LimitRequestBody, that is placed within a Directory tag. The size of your limit will depend upon your Web site’s needs. By default, LimitRequestBody is set to unlimited.
   * **Hide Apache’s version number**
<code>
ServerSignature Off
ServerTokens Prod
TraceEnable Off
</code>

in ssl.conf

   SSLProtocol -ALL +SSLv3 +TLSv1
   SSLCipherSuite ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM

in vhost

   Include conf/ssl.conf
   RewriteEngine on
   RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
   RewriteRule .* - [F]

   * **Disable unnecessary PHP variable**
<code>
allow_call_time_pass_reference = Off
magic_quotes_gpc = Off
register_long_arrays = Off
register_argc_argv = Off
allow_url_fopen = Off
expose_php = Off
disable_functions = symlink,shell_exec,proc_close,proc_open,dl,passthru,escapeshellarg,escapeshellcmd,openlog, apache_child_terminate,apache_get_modules,apache_get_version,apache_getenv,apache_note,apache_setenv,virtual, phpinfo
</code>

===== mod_deflate (Apache2) =====

also see: [[http://www.howtoforge.com/apache2_mod_deflate|HowtoForce - ModDeflate]], [[http://pflanze.mine.nu/~chris/mod_deflate/mod_deflate_readme_EN.html|mod_deflate]]
  <Location />
   # Insert filter
   SetOutputFilter DEFLATE
  
   #DeflateFilterNote ratio
   #DeflateCompressionLevel 9
   # 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
  
   # Don't compress images
   SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
   SetEnvIfNoCase Request_URI \.(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-vary
   SetEnvIfNoCase Request_URI \.pdf$ no-gzip dont-vary
  
   # Make sure proxies don't deliver the wrong content
    Header append Vary User-Agent env=!dont-vary
  </Location>

This configuration will compress everything except for images. Of course, you can’t test this with curl, but you can test it with Firefox and [[https://addons.mozilla.org/en-US/firefox/addon/3829|LiveHTTPHeaders]]. If you don’t have Firefox handy, you can try a very handy **[[http://www.gidnetwork.com/tools/gzip-test.php|web application]]** that will give you the statistics about the compression of your site’s data.


deflate.load
header.load


= SSL =
http://www.mail-archive.com/modssl-users@modssl.org/msg10790.html\\

ssl.conf\\
#SSLSessionCache         shmcb:/var/run/apache2/ssl_scache(512000)\\
SSLSessionCache         dbm:/var/run/apache2/ssl_scache\\
SSLSessionCacheTimeout  300\\