Configure the firewall of the server on which a self-managed PostgreSQL instance resides - RDS PostgreSQL Database| Alibaba Cloud Documentation Center

The cloud migration feature of ApsaraDB RDS for PostgreSQL allows you to migrate the data of a self-managed PostgreSQL instance from an Elastic Compute Service (ECS) instance or a data center to an ApsaraDB RDS for PostgreSQL instance. This topic describes how to configure the firewall of the server on which a self-managed PostgreSQL instance resides to allow access to the port of the self-managed PostgreSQL instance before a cloud migration.

Procedure

Note In this topic, the server on which the self-managed PostgreSQL instance resides runs CentOS. For more information about how to configure the firewall of a server that runs a different operating system, see the related official documentation.

CentOS 7

Connect to the server on which the self-managed PostgreSQL instance resides.
View the ports that are opened.
```
firewall-cmd --list-ports
```
Configure the port of the self-managed PostgreSQL instance to allow access to the port.
```
firewall-cmd --zone=public --add-port=5432/tcp --permanent
```
Restart the firewall of the server.
```
firewall-cmd --reload
```

CentOS 6 or earlier versions

Connect to the server on which the self-managed PostgreSQL instance resides.
View the ports that are opened.
```
/etc/init.d/iptables status
```

Open port 5432.

/sbin/iptables -I INPUT -p tcp --dport 85432 -j ACCEPT

Restart the firewall of the server.
```
service iptables restart
```

Note You can also disable the firewall of the server before a cloud migration. In this case, you do not need to configure the firewall.

CentOS 7:
```
systemctl stop firewalld.service
```
CentOS 6 or earlier versions:
```
service iptables stop
```

What to do next

Migrate the data of a self-managed PostgreSQL instance to an ApsaraDB RDS for PostgreSQL instance