.-------------------. 
            (                     )-.
          .'  Network Provider (DMS) ' 
          (                           ) 
           (        Call Home       -'
            '-(    DOTS client      )
               '---------+---------' 
                         |
   ---             +-----+-----+   
  S |              |  CPE/NAT  |  External Realm
  O |..............|           |................
  U |              | Call Home |  Internal Realm        
  R |              |DOTS server| 
  C |              +-----+-----+        
  E |                    |   
    |        .-----------+-------. 
    |       (                     )-.
  N |     .'                         ' 
  E |     (     Local Area Network    ) 
  T |      (                        -'
  W |       '-(                     )
  O |          '--------+----------' 
  R |                   |  
  K |            +------+------+
    |            |Attack Source|                           
                 +-------------+