Postgresql listens per default on localhost. To change this you need to configure it in postgresql.conf
On a debian system you will find your configuration files in e.g.
As you can see, the path depends on the version of postgres you are using. To make postgres listen on all your network cards you will have to change the default configuration which only listens on localhost connections.
You should look for the listen_addresses and port entries.
To make postgres listen on all your ip addresses you will have to set listen_addresses to:
listen_addresses = '*'
port = 5432
You could also change the default port to listen on! If you try to make a connection, it will probably be refused. Your error message has changed, but it does not work yet. This is due to the default pg_hba.conf. You will have to make changes here too!
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.