Log in to the Alibaba Cloud server and enter the console. Click the cloud server ECS.
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Click an instance in the ECS of Cloud Server and jump to the list of instances.
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Locate the Cloud Server instance whose port you want to open in the instance list. Then click More-Network and Security Groups-Security Group Configuration.
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Click Configure Rules in the security groups for this instance to open the security group rules. There is a direction of entry and exit, here I open port 8082, which belongs to the direction of entry and exit. You can add new rules here. Here, in order to clone an existing rule directly, click the Clone button after the reference rule.
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Edit security group rules. In my room, I will change the port range of cloning information to 8082/8082, and then press the OK button. This will add the rule and open port 8082.