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