What Should I Do If a Database Client Problem Causes a Connection Failure?
Troubleshoot RDS connection failures caused by a client problem by checking the following items:
- ECS Security Policy
In Windows, check whether the RDS instance port is enabled in the Windows security policy. In Linux, run iptables to check whether the RDS DB instance port is enabled in firewall settings.
- Application Configuration
- Username or Password
- [Warning] Access denied for user 'username'@'yourIp' (using password: NO)
- [Warning] Access denied for user 'username'@'yourIp' (using password: YES)
- Login failed for user 'username'
If the problem persists, contact post-sales technical support.