Login to server from local machine using your username@server_ip_address
ssh username@server_ip_address
Go to postgresql directory and find existing version
cd /etc/postgresql/9.5/main
In postgresql.conf
add the following line at the bottom of the file
listen_addresses = '*' end of the file
In pg_hba.conf
add the following line at the bottom of the file
host all all 0.0.0.0/0 md5
host all all ::/0 md5
Allow port default postgres port 5432 in the firewall to be able to connect
ufw allow 5432/tcp
Restart postgres service
sudo service postgresql restart
On local machine, try to connect to database on postgres server using your server_ip_address
psql -h server_ip_address -U postgres