The device being connected by an unknown device for the first time

[HDU-rib]

My device as a slave, if the surrounding environment is not good, the unknown master device connected to my slave device caused the real master device to be unable to scan and initiate the connection.How to prevent the device being connected by an unknown device for the first time ？ If the first connection is successful，I can use the bonding and whitelist to determine whether it is my device（I am using the nrf52832 development board）

[endnode]

The only way is: if you don't like connecting peer (for whatever reason in whatever stage of the connection) you can always disconnect (terminate connection on LL). If you don't know who is the right "guy" to connect, well, then you have a problem;)