purpose of an entry in pg_hba.conf file

From: Atul Kumar <akumar14871(at)gmail(dot)com>
To: pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: purpose of an entry in pg_hba.conf file
Date: 2023-10-26 00:10:48
Message-ID: CA+ONtZ4U-g6QuA20eRdT7T5VNA2Np6Tjoh56o2b1Ah27FM5r0A@mail.gmail.com
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Hi,

As you know already, pg_hba.conf file always has the below entry after
successful installation of postgres.

host all all 127.0.0.1/32 trust

Please let me know what is the exact purpose of this entry and what would
be the impact of removing it on other tools/processes like pgbouncer, pem,
replication etc ?

Regards,

Atul

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