What Should I Do If a Database Client Problem Causes a Connection Failure?

Identify a GaussDB connection failure caused by a client problem from the following aspects:

1. ECS security policy

   On a Windows server, check whether the GaussDB instance port is enabled in the Windows security policy. On a Linux server, run iptables to check whether the instance port is enabled in firewall settings.

2. Incorrect application configuration

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

3. Incorrect username or password

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

   gsql: ERROR: dn_6001_6002_6003: Invalid username/password,login denied.

If the problem persists, contact technical support.