any tips to have restricted inbound and getting connected with postgresql dB

[Y_Bharani_mbsv <mailbsv@xxxxxxxxx>]

 Team

I have the need to have postgresql db running in multiuser mode and do my needed tasks for few mins.

How to restrict all the application layer , not to get connected with the postgres db ,

during my specific time window

 

I am aware of their application layer - username

Changing password is the last option

Any tips