How to correctly modify the Remote Desktop Connection port in Win8

How to correctly modify the Remote Desktop Connection port in Win8 there are many methods on the Internet about how to correctly modify port 3389, but to put it bluntly, they are all about modifying the two registry key values, after modifying the two ports on the internet, I found that the two ports could not be connected. Then I searched again and found that it may be the cause of the firewall. So I tried to close the firewall and the connection was successful. It seems that the firewall has blocked Remote Desktop ports other than 3389. disabling the firewall can bypass this problem, but the indicator does not cure the problem. Instead, the firewall may cause the system to be less secure. Therefore, the firewall should be able to do nothing. Here we need to find a way to modify the firewall rules so that they can allow the modified ports. So how can I add a protection wall exception? Go to the control panel, select windows Firewall, click Advanced Settings, select inbound rules, find Remote Desktop-user mode (Tcp-in), right-click Properties, switch to protocol and port, unfortunately, all settings here are gray! In fact, in the regular tab, the system has reminded us that this is a predefined rule and some attributes may not be modified. It seems that it is impossible to add exceptions in this way, but the difficulty is not difficult. Don't forget to have the ultimate skill-registry! Go to the Registry and click [HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/services/SharedAccess/Defaults/FirewallPolicy/FirewallRules]. change the value of RemoteDesktop-In-TCP to 3389 of the data to the previously modified port, and then click: [HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/services/SharedAccess/Parameters/FirewallPolicy/FirewallRules], change 3389 of the RemoteDesktop-In-TCP value to the preceding port and exit the registry, can I successfully connect to the Remote Desktop after restarting the system?