Manage Simple Application Server in the Alibaba Cloud app

Access the console

Remote connection

You can use the Alibaba Cloud app to remotely connect to a Simple Application Server instance with a password or a key pair.

Reset server password

After creating a server, you can use the Reset Password feature to set its logon password. You can also use this feature if you forget the password.

You can set or reset the password only for the administrator account on the console.

• The administrator account for a Linux server is root.

• The administrator account for a Windows server is Administrator.

1. On the Instances page, select the region where the instance is located. For example, China (Hangzhou).

2. On the server card, tap > Reset Password.

3. Enter the Server Administration Password and Enter Password Again according to the server password requirements, and then click Confirm Resetting.

4. In the Restart Server Now dialog box, tap OK.

   Warning

   Restarting the instance stops your services and may cause business interruptions. We recommend that you perform this operation during off-peak hours. You can select No, I will restart it later and then restart the server during off-peak hours to apply the new password.

Server monitoring

View monitoring metrics for your Simple Application Server instance, such as traffic, vCPU, memory, and system disk, to understand resource usage and improve O&M efficiency.

Start, stop, or restart a server

You can start, stop, or restart a server as needed.

Configure firewall

The firewall controls inbound traffic to your Simple Application Server instance to ensure security. You can add, modify, disable, enable, and delete firewall rules for your instance.

1. On the Instance List page, select the region where the instance is located. For example, China (Hangzhou).

2. Tap the server card to go to the Details page.

3. Tap the Firewall tab and perform the following operations as needed.

   Add rule

   • You can add up to 50 firewall rules for each Simple Application Server instance.

   • Port 25 is the default email service port. For security reasons, port 25 is restricted by default on Simple Application Server instances. If you need to send emails, use port 465.

   • The firewall controls only inbound traffic. All outbound traffic is allowed by default.

     • Inbound traffic: data transmitted to a Simple Application Server instance from an external source.

     • Outbound traffic: data transmitted from a Simple Application Server instance to an external destination.

   1. At the bottom of the page, tap Add Rule.

   2. On the Add Rule page, configure the parameters.

      Parameter	Description
      Application Type	Select Specify a custom value or a preset application type.
      Protocol	Select TCP, UDP, or ICMP.
      Port Range	The valid port range is 1 to 65535. You can set the port range in the following ways: Specify a single port Enter the port number to allow. For example, to allow traffic for the default MySQL port (3306), set the port range to 3306. Specify a port range Specify a port range separated by a forward slash (/). For example, if you need to allow ports from 20000 to 30000 that are manually configured in an FTP configuration file, set the port range to 20000/30000.
      Source IP restriction	The default value is 0.0.0.0/0, which allows access from all IPv4 addresses. You can also specify the IPv4 addresses that are allowed to access the server: Allow access from a single IPv4 address Enter a single IPv4 address. Example: 192.168.0.100. Allow access from all IPv4 addresses in a CIDR block Enter an IPv4 CIDR block. Example: 192.168.0.0/24.
      Remarks	Enter remarks for the firewall rule to facilitate future management.

   3. Tap Commit.

   Modify rule

   If a default or existing firewall rule does not meet your business needs, you can modify it.

   1. For the target firewall rule, tap > Modify.

   2. On the Modify Rule page, you can modify the Protocol, Port Range, Source IP Restriction, and Remarks as needed.

   3. Tap Commit.

   Disable rule

   If you need to temporarily close a port, you can disable its corresponding rule instead of deleting it. This allows you to easily re-enable it later.

   Important

   Disabling a firewall rule may disrupt your services. Use this feature with caution.

   1. For the target firewall rule, tap > Disable.

   2. In the Confirm Disable dialog box, tap OK.

   Enable rule

   You can enable a previously disabled rule to reopen its port.

   1. For the target firewall rule, tap > Enable.

   2. In the Confirm Enable dialog box, tap OK.

   Delete rule

   If a firewall rule is no longer needed, you can delete it.

   Note

   If you have not reached the limit of 50 firewall rules, we recommend that you disable the rule instead of deleting it. This allows you to easily enable it later.

   1. For the target firewall rule, tap > Delete.

   2. In the OK dialog box, tap OK.

Create snapshot

A snapshot is a point-in-time copy of your disk data. Snapshots are often used for routine backups, disaster recovery, and creating custom images.

1. On the Instances page, select the region where the instance is located. For example, China (Hangzhou).

2. On the server card, tap > Create Snapshot.

3. On the Create Snapshot page, select a disk, enter a snapshot name, and then tap Commit.

Renew server

Renew your server subscription before it expires. Otherwise, the instance and its associated snapshots and custom images are released, and the data cannot be recovered. For more information about renewals and automatic renewal, see Renew an expiring resource.