N |        .-------------------. 
  E |       (                     )-.
  T |     .'                         ' 
  W |     (        Call Home          ) 
  O |      (      DOTS client       -'
  R |       '-(                     )
  K |          '-------+-----------' 
    |                  |      
  P |                  |
  R |              +---+---+
  O |              |  CGN  |        External Realm
  V |..............|       |......................         
  I |              |       |        Internal Realm
  D |              +---+---+        
  E |                  |
  R |                  |
   ---                 |   
             .---------+---------. 
            (                     )-.
          .'     Source Network      ' 
          (                           ) 
           (        Call Home        -'
            '-(    DOTS server      )
               '------+------------' 
                      |  
                +-----+-------+
                |Attack Source|
                +-------------+