How to enable or allow remote access to PostgreSQL database server.

For enabling remote access to PostgreSQL database server,

There are 2 main PostgreSQL configuration files that need to be changed to allow remote connections.
1. postgresql.conf
2. pg_hba.conf

postgresql.conf

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It will be located in PostgreSQL installed directory,

In Linux, You may find file at location below,

1. /var/lib/pgsql/data/
2. /etc/postgresql/9.1/main/

In Windows, You may find file at location below,

1. C:/ProgramData/PostgreSQL/9.3/postgresql.conf

For exact location of "postgresql.conf" file, run the below command in psql command prompt.

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1	SHOW config_file;

Open the file and search for "listen_addresses" and set listen_addresses parameter to,

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1	listen_addresses = '*'

pg_hba.conf

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It will be located in several directory, depending on how postgresql is installed

In Linux, You may find file at location below,

1. /home,
2. /var/lib/pgsql, 
3. /var/lib/postgresql/[version]/, 
4. /opt/postgres/  
5. /etc/postgresql/[version]/main/

In Windows, You may find file at location below,

1. C:/ProgramData/PostgreSQL/9.3/pg_hba.conf

For exact location of "pg_hba.conf" file, run the below command in psql command prompt.

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1	SHOW hba_file;

If you want PostgreSQL to accept incoming connection from any IP address then add entry like below,

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1	host             all             all             0.0.0.0/0             md5

If you want PostgreSQL to accept incoming connection from particular IP address, say 192.168.82.2 then add entry in pg_hba.conf file like below,

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1	host             all             all            192.168.82.2/24       md5

Reload Configuration

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After the changes are done, you have to reload the configuration as a superuser. run below command,

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1	SELECT pg_reload_conf();

Done.

If PostgreSQL is still not accepting remote connection then try restarting the PostgreSQL service like below.

In Linux, If your PostgreSQL service name is "postgresql" then execute below command

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1	service postgresql restart

In Windows, You can find service at

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1 2	Start Menu ---> Search "Run" ---> Type "Services.msc" ---> Search "PosgreSQL"   ---> Right click and select Restart Service.

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Enjoy !!!! 

If you find any issue in post or face any error while implementing, Please comment.