Postgresql – psql: could not connect to server… Is the server running on host … and accepting TCP/IP connections on port 5432

azureazure-virtual-machinepostgresqltcp

I know this is a popular question. I have tried everything suggested in similar threads. I am trying to connect remotely to a postgresql database on an azure windows server 2012 machine. I have tried the following…

postgresql.conf

listen_addresses = '*'

pg_hba.conf

# IPv4 local connections:
host    all             all             0.0.0.0/0            md5

Firewall

New inbound rule (firewall) protocols and ports > protocol type > TCP

Local port > 5432 Remote port > All

Grab IP of remote machine

I copied from azure dashboard and also as indicated on top of remote desktop connection

CMD from local machine

Then from local machine tried the following.

psql -U postgres -h 13.xx.xx.xx

Error message.

psql: could not connect to server: Connection timed out
(0x0000274C/10060)
Is the server running on host "13.xx.xx.xx" and accepting
TCP/IP connections on port 5432?

I am not sure what else should be done.

Best Answer

After you modify configuration file, you need restart it. You could use netstat -ant|findstr 5432 to check it. It should listen like below:

C:\Users\shui>netstat -ant|findstr 5432
  TCP    0.0.0.0:5432           0.0.0.0:0              LISTENING       InHost
  TCP    [::]:5432              [::]:0                 LISTENING       InHost

It seems a firewall issue. You need open port 5432 on Azure NSG.

I test in my lab, it works for me.

Start manually

pg_ctl -D /usr/local/var/postgres start

Stop manually

pg_ctl -D /usr/local/var/postgres stop

Start automatically

"To have launchd start postgresql now and restart at login:"

brew services start postgresql

What is the result of pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start?

What is the result of pg_ctl -D /usr/local/var/postgres status?

Are there any error messages in the server.log?

Make sure tcp localhost connections are enabled in pg_hba.conf:

# IPv4 local connections:
host    all    all    127.0.0.1/32    trust

Check the listen_addresses and port in postgresql.conf:

egrep 'listen|port' /usr/local/var/postgres/postgresql.conf

#listen_addresses = 'localhost'        # What IP address(es) to listen on;
#port = 5432                # (change requires restart)

Cleaning up

PostgreSQL was most likely installed via Homebrew, Fink, MacPorts or the EnterpriseDB installer.

Check the output of the following commands to determine which package manager it was installed with:

brew && brew list|grep postgres
fink && fink list|grep postgres
port && port installed|grep postgres

Postgresql – psql cant connect to PostgreSQL server (postmaster) on IP and port 5432

As your netstat output indicates, it's listening at 127.0.0.1:5432 which is localhost. That is only connectable from localhost ;)

Set listen_addresses='*' in your config and it will work.

[edit] Other things to check:

is the amazon firewall blocking anything?
is iptables blocking anything?

But first make sure the listening address is correct, your netstat output shows that it won't work like this.

Best Answer

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Postgresql – psql cant connect to PostgreSQL server (postmaster) on IP and port 5432

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