Binding and Unbinding an EIP

You can bind an EIP to your instance to enable public network access. You can unbind it later if it is no longer needed.

• To ensure that a DB instance is accessible, the security group associated with the instance must allow access over the database port. For example, if the database port is 5432, ensure that the security group allows access over the 5432 port.
• You need to configure security groups and enable specific IP addresses and ports to access the target DB instance. Before accessing the DB instance, you need to add an individual IP address or an IP address range that will access the DB instance to the inbound rule. For details, see Configuring Security Group Rules.
• Public accessibility reduces the security of DB instances. Therefore, exercise caution when deciding to connect to your instance through a public network.

• You can bind an EIP to a primary DB instance or a read replica only.
• If a DB instance has already been bound with an EIP, you must unbind the EIP from the DB instance first before binding a new EIP to it.

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 DB instance name to go to the Basic Information page.
4. In the navigation pane on the left, choose Connectivity & Security. In the Connection Information area, click Bind next to the EIP field.
5. In the displayed dialog box, all unbound EIPs are listed. Select the EIP to be bound and click OK.
6. On the Connectivity & Security page, view the EIP that has been bound to the DB instance.

   You can also view the progress and result of binding an EIP to a DB instance on the Task Center page.

   To unbind the EIP from the DB instance, see Unbinding an EIP.

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 DB instance associated with an EIP to go to the Basic Information page.
4. In the navigation pane on the left, choose Connectivity & Security. In the Connection Information area, click Unbind next to the EIP field. In the displayed dialog box, click OK.
5. On the Connectivity & Security page, check the result.

   You can also view the progress and result on the Task Center page.

   To bind an EIP to the DB instance again, see Binding an EIP.