I know that Cloadflare let us use only specific ports listed below.
The HTTP ports that Cloudflare support are:
80
8080
8880
2052
2082
2086
2095
Although I was successfully use these ports, some days later port becoming blocked or something else that I can’t reach that port. So I chose another one from list. At first it is working well but a few days later the port is getting blocked again. It is interesting. Is the anyone who has idea?