- 1 year ago
Postgresql: Connection refused on port 5432
If you're encountering a "Connection refused" error when trying to connect to PostgreSQL on port 5432, it typically indicates that the PostgreSQL server is not accepting incoming connections or is not running. Here are some steps to troubleshoot and resolve the issue:
Verify PostgreSQL service status: Ensure that the PostgreSQL service is running on the server. You can check this in the services list on your operating system. Look for a service named "PostgreSQL" or something similar and ensure it is in the "Running" state.
Check the PostgreSQL server configuration:
a. Locate the PostgreSQL configuration file calledpostgresql.conf
. The file is typically located in the PostgreSQL installation directory.
b. Openpostgresql.conf
in a text editor and search for the line containingport = 5432
. Ensure that the port number matches the one you're trying to connect to. If it's different, you'll need to adjust your connection settings accordingly.
c. Check thelisten_addresses
parameter inpostgresql.conf
and make sure it is set to the appropriate IP address or*
to listen on all available IP addresses. If necessary, adjust the parameter and save the file.
d. Restart the PostgreSQL service to apply any configuration changes.Verify firewall settings: Ensure that the firewall on the server allows incoming connections on port 5432. If a firewall is blocking the connection, you'll need to configure it to permit incoming connections on that port.
Check network connectivity: Ensure that there is network connectivity between the client machine and the PostgreSQL server. You can test this by using utilities like
ping
ortelnet
to verify that you can reach the server's IP address and the specific port (5432).Verify the client connection settings: Double-check the connection parameters in your client application or tool (e.g., host, port, username, password, database name). Ensure that they are correct and match the configuration of the PostgreSQL server.
Consult the PostgreSQL logs: Check the PostgreSQL server logs for any error messages or warnings related to the connection issue. The logs are usually located in the PostgreSQL installation directory, specifically the
data
orpg_log
subdirectory. Look for files with names likepostgresql-<version>-main.log
.
By following these steps, you should be able to diagnose and resolve the "Connection refused" error when connecting to PostgreSQL on port 5432.