# Parameters in /shadowing/

In this section, we will describe all the parameters currently used by the shadowing feature. These configuration parameters reside in `/opt/thinlinc/etc/conf.d/shadowing.hconf`.

/shadowing/allowed_shadowers

  A space-separated list of users and/or groups that are allowed to shadow other users. Group names are prefixed with `+` sign. Please note that these users will gain full access to other users’ sessions. See Shadowing for more information.

/shadowing/shadowing_mode

  A constant string value of `reject`, `silent`, `notify`, or `ask`. This value configures in which way a shadowing request is handled.

  `reject`

    All shadowing requests are rejected. You should set this if you want to disable the shadowing feature.

  `silent`

    All shadowing requests are accepted and the user will not be notified about being shadowed.

  `notify`

    All shadowing requests are accepted and a message box will be shown to notify the user when the shadowing starts and when the shadowing ends.

  `ask`

    Shows a dialog to the user and gives him the full control of deciding to accept or reject the shadowing request. If the request timeout is reached without the user making a decision then the shadowing request will be rejected. Like for notify the user is also informed when the shadowing ends.

  See Shadowing for more information.