Configure PostgreSQL to work for only LOCALHOST or specified ip + port

Question

I want to configure PostgreSQL to accept connections only from a specified IP. It should not accept requests from any other IP.

Answer 1

The following example pg_hba.conf allows local and a specified IP to have privileged login, but rejects others.

# TYPE  DATABASE        USER            ADDRESS                 METHOD
local   all             all                                     trust
host    testdb          testuser      192.168.1.1/32            md5
host    all             all           0.0.0.0/0                 reject 

Answer 2

Check the pg_hba.conf file in the data folder of PostgreSQL. This is the client authentication configuration file.

# TYPE  DATABASE        USER            ADDRESS                 METHOD
host    testdb           testuser      192.168.1.1               md5
local   testdb           all                                     md5

Add the above to the pg_hba.conf file

Answer 3

The easiest way is to make PostgreSQL listen only on localhost for incoming connections. The relevant parameter is listen_addresses in postgresql.conf. The doc is here.