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Opening Port 443 is not working in Ubuntu VM of Azure

I have tried to open the port 443 and it is not working. I have successfully opened the port 80 without any problem but when I do the same for the 443 it is not working.

I tried it from the Networking tab of the VM page. here is the screenshot

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I am testing it with different tools online to see if the port is opened or not. And all of them is saying that the port 443 is close but the 80 is open.

检查应用程序正在侦听所述端口并检查操作系统级防火墙允许该端口

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