July 2005
Intermediate to advanced
1032 pages
27h 10m
English
Content preview from PostgreSQL, Second Edition
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Securing Network Access
The next step in securing a PostgreSQL installation is determining which computers are allowed to access your data.
PostgreSQL uses the $PGDATA/pg_hba.conf file to control client access (hba is an acronym for host-based authentication). When a client application (such as psql) tries to connect to a PostgreSQL server, it sends a username and database name to the postmaster (I'll call those the target user and the target database). For example, if you run psql like this
$ psql -U bruce -d sales
the target user is bruce and the target database is sales.
When this request arrives, the postmaster searches through pg_hba.conf to find an entry that matches the target user, target database, client address, and connection type. ...
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