====== fail2ban ======
Bans IP that make too many password failures

===== Kernel =====
  * Folgende Module müssen aktiviert sein:

  [*] Networking support  ---> 
    Networking options  --->
      [*] Network packet filtering framework (Netfilter)  --->
        Core Netfilter Configuration  --->
          [M] Netfilter Xtables support (required for ip_tables)
   
  [*] Networking support  ---> 
    Networking options  --->
      [*] Network packet filtering framework (Netfilter)  --->
        Core Netfilter Configuration  --->
          IP: Netfilter Configuration  --->
            <M> IP tables support (required for filtering/masq/NAT)
            <M>   "addrtype" address type match support
            <M>   Packet filtering 
            <M>     REJECT target support