Ah, I suppose that would cover most bases. If they own the servers and they are giving permission to access them in such a way then there's likely no worries over unauthorized access type laws.
-----------------Network-----------------------------------
my_fortress <- targeted by: competitors_command&control_box
my_command&control_box :targets -> competitors_fortress
-----------------------------------------------------------
No shady traffic ever needs to traverse the public internet. Only ssh access to my_command&control_box and my_fortress is required. This has the added benefit of normalizing the attacking horsepower of the entrants.