Changing a Database Port

This section describes how to change the database port of an RDS primary instance or read replica. If you change the database port of a primary instance, the standby instance's port will also be changed.

If specific security group rules have been configured for a DB instance, you need to change the inbound rules of the security group to which the DB instance belongs after changing the database port.

1. Log in to the management console.
2. Click in the upper left corner of the page and choose Database > Relational Database Service.
3. On the Instances page, click the target DB instance name or click first and then click the target read replica name.
4. On the Basic Information page, find Database Port and click Change.

   RDS for PostgreSQL instances can use database ports 2100 to 9500.

   • In the displayed dialog box, click Yes.
     • If you change the database port of the primary DB instance, that of the standby DB instance will also be changed and both DB instances will be rebooted.
     • Changing the database port of a read replica does not affect other instances. The change and subsequent reboot apply only to that read replica.
     • This process takes 1 to 5 minutes.
   • In the displayed dialog box, click No to cancel the modification.

5. View the result on the Basic Information page.