Considerations when publishing programs on a server or in the cloud

　　When publishing the program on the server or the cloud, if it is found that the configuration is correct, but it cannot be accessed. At this time, it is necessary to check whether the firewall is opened in the server system, whether the firewall opens the external port, and whether the external port is developed in the security group of the cloud server. (For example, https, you need to develop port 443 on the server side, and you need to open the port 443 in the security group - open port to the outside world in the Tencent Cloud server configuration).