===== Linux Server =====
  * MySQL Backups: mylvmbackup
  * etckeeper
  * molly-guard


===== Apache =====
==== dev umgebugsvariable ====

  * CentOS: ''/etc/systemctrl/httpd'': ''OPTIONS='-D dev'''
  * htaccess
<code>
<IfDefine dev>
        SetEnv DEV 1
</IfDefine>
<IfDefine !dev>
        whatever not for dev
</IfDefine>
</code>

  * php
<code>
            if(isset($_SERVER['DEV'])){
                $dofordev
            }
</code>

==== proxy header blocken ====

  * ''RequestHeader unset Proxy early''
  * https://httpoxy.org/

==== htaccess conditions ====
<code>
<If "req('Host') == 'url.de'">
        AuthName "protected"
        AuthType Basic
        AuthUserFile /path/to/.htpasswd
        require valid-user
</If>
</code>