An arrangement for protecting against unauthorized intervention in a containment through an access present in a port flange using a work glove (3,4), wherein: a) the port flange is installed in a front window or in a wall of a housing of the containment positioned in an installation space; b) the work glove (3,4) is installed on the port flange and allows an operator to enter a work chamber of the containment in a protected manner; c) in the event that multiple port flanges are installed on the containment, there is one work glove (3,4) fastened to each port flange; d) equipment for processing a material to be treated can be provided in the work chamber; and e) to temporarily block access, a shut-off part is provided, which can move into a blocking position and an open position; f) to record personal data of the operator, a capture unit is provided, which has a connection to a microcontroller, in order to issue a switching command to an activator if there is correspondence between the captured personal data and the data in the microcontroller, whereby the shut-off part can be brought into the blocking position or can be moved therefrom into the open position and therefore the access is blocked or accessible, respectively; g) the activator is arranged directly on the port flange or on the shut-off part or on the front window; and h) the data of the microcontroller are stored directly therein or originate from an external control unit, characterized in that i) the shut-off part, in the configuration as a separate closure body which can be docked on or removed from the port flange, or the port flange are provided with: ja) the capture unit; jb) the microcontroller; and jc) the activator, which is actuatable manually or in driven fashion and serves to move the shut-off part into the blocking or open position; and optionally with: jd) a display and a battery. a) the port flange is installed in a front window or in a wall of a housing of the containment positioned in an installation space; b) the work glove (3,4) is installed on the port flange and allows an operator to enter a work chamber of the containment in a protected manner; c) in the event that multiple port flanges are installed on the containment, there is one work glove (3,4) fastened to each port flange; d) equipment for processing a material to be treated can be provided in the work chamber; and e) to temporarily block access, a shut-off part is provided, which can move into a blocking position and an open position; f) to record personal data of the operator, a capture unit is provided, which has a connection to a microcontroller, in order to issue a switching command to an activator if there is correspondence between the captured personal data and the data in the microcontroller, whereby the shut-off part can be brought into the blocking position or can be moved therefrom into the open position and therefore the access is blocked or accessible, respectively; g) the activator is arranged directly on the port flange or on the shut-off part or on the front window; and h) the data of the microcontroller are stored directly therein or originate from an external control unit, characterized in that i) the shut-off part, in the configuration as a separate closure body which can be docked on or removed from the port flange, or the port flange are provided with: ja) the capture unit; jb) the microcontroller; and jc) the activator, which is actuatable manually or in driven fashion and serves to move the shut-off part into the blocking or open position; and optionally with: jd) a display and a battery. ja) the capture unit; jb) the microcontroller; and jc) the activator, which is actuatable manually or in driven fashion and serves to move the shut-off part into the blocking or open position; and optionally with: jd) a display and a battery.