Search code examples
postgresqlubuntupsqlcentos7

"psql: could not connect to server: Connection refused" Error when connecting to remote database

I am trying to connect to a Postgres database installed in a remote server using the following command:

psql -h host_ip -U db_username -d db_name

This is the error that occurs:

psql: could not connect to server: Connection refused Is the server running on host "<host_ip>" and accepting TCP/IP connections on port 5432?

  1. Postgres installed version is 9.4.
  2. Host operating system: Ubuntu 15.04
  3. Client operating system: Centos 7

I already tried the following but the issue remains unresolved:

  1. Edited pg_hba.conf file to include

host all all 0.0.0.0/0 md5

  1. Edited 'postgresql.conf' and changed the listen parameter to

listen_addresses='*'

  1. Restarted Postgres service.
  2. Disabled firewall and iptables on host and client.
  3. I checked by running the psql command locally and it worked.
  4. I tried the second solution given in this question. Running nmap gave me the following output:

Starting Nmap 6.47 ( http://nmap.org ) at 2015-09-07 18:08 IST Nmap scan report for 10.17.250.250 Host is up (0.0000040s latency). Not shown: 997 closed ports PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp 80/tcp open http

Am I missing something? Hope someone can help.

Solution 
  • cd /etc/postgresql/9.x/main/

    open file named postgresql.conf

    sudo vi postgresql.conf

    {Note:-(You can use sudo "nano") If facing issues with editing through vi(Vim)]

    add this line to that file

    listen_addresses = '*'

    then open file named pg_hba.conf

    sudo vi pg_hba.conf

    and add this line to that file

    host  all  all 0.0.0.0/0 md5

    It allows access to all databases for all users with an encrypted password

    restart your server

    sudo /etc/init.d/postgresql restart