[GENERAL] Changing access permissions without re-starting the database

[Carlos]

Hi Forum, Is there a way to change the database access permissions for different IP addresses without having to re-start PostgreSQL?  I often want to preclude all IP address but one from accessing the database.  Currently, I change the pg_hba.conf file and re-start the database but I would like to be able to do the same thing without having to re-start.   Thanks in advance for your response