Question so to mitigate your overwatch score when on a run that you want to do Team Overwatch on, you should gain user access to the host which will allow you to use control device on anything on that host like doors, cameras, maglocks and the like? Because control device is legal you would gain less of an increase to your overwatch score, correct?
Yes! =)
If you do not have time to prep (and you do not have access on the network already) then you will probably often depend on illegal spoof commands just like SSDR wrote above (where each of them cause overwatch score on opposed hits) or, if you wish to control them directly yourself, brute force your way into the network with just a single major action (but this will count as "illegal User-access" which mean your overwatch score will automatically increase each round!).
If you have time to prep then you would instead spend a at least a minute or so to probe the network for vulnerabilities and then exploit it to gain entrance via a backdoor. Unlike brute forcing your way into the network, this will
not count as having "illegal Admin-access" which mean your overwatch score will
not automatically increase each round. Once inside you can run matrix overwatch by legally control each device with the control device action which will not increase overwatch score on opposed hits.
6E p. 180 Backdoor Entry
If the test is successful, you gain Admin access to the target, and it does not count as illegal Admin access (though taking illegal Matrix Actions will still increase your Overwatch Score).6E p. 176 Overwatch Score and Convergence
Things that increase the Overwatch Score are as follows...
• Maintaining illegal access to anything on the Matrix: +1 OS/round for each host where you maintain illegal User-level access, +3 OS/round for each host where you maintain illegal Admin-level access.Having said that, Spoof Command actions are
only opposed by Data Processing while Control Device actions (if there is no skill associated with the device) are resisted by
both Willpower
and Firewall.
To quote Yoda; "The Dark Side is quicker, easier, more seductive... easily they flow, quick to join you in a fight. If once you start down the dark path forever will it dominate your destiny"
The two actions are also used when influencing drones, but both of them work different in this scenario;
Piloting a drone with your own piloting skill to perform stunts or sneak with a hostile drone or using your own engineering skill to fire its on-board mounted weapons will
not be resisted at all as long as you maintain user access on the network the drone is connected to. You just take the piloting or engineering actions directly.
Spoofing a command to the on-board auto-pilot of a drone to have the drone using its own auto-softs and ratings, however, will be opposed by
both the on-board pilot
and the firewall of the network the drone is connected to.