When we manage a web server, the server often belongs to you and hackers, because you can control the server and hackers can, so we need to manage security and fix loopholes to a certain extent, so that hackers are invulnerable.
Alibaba Cloud Server Configuration Security Group
Alibaba Cloud Server Add Port
Release the changed port at the security of the panel:8899(example)
Simply test whether the port can be released to take effect
Modify ports on the panel
Simple test on the server if the port used by the lower panel allows us to allow the port
Use the new panel port for the login panel, see the command: bt 14