What Should I Do If My RDS for PostgreSQL Instance Fails to Be Connected Due to Client Problems?

Troubleshoot RDS for PostgreSQL connection failures caused by a client problem by checking the following items:

• ECS Security Policy

  In Windows, check whether the RDS for PostgreSQL instance port is enabled in the Windows security policy. In Linux, run iptables to check the firewall and port allowlist.

• Application Configuration

  Check whether the connection address, port parameter configuration, and JDBC connection parameter configuration are correct.

• Username or Password

  Check whether the username or password is correct if an error similar to the following occurs during RDS DB connection:

  FATAL:  Invalid username/password,login denied.

If the problem persists, submit a service ticket.