Ports involved in ICC configuration for backup tftp file transfer process

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What ports are involved in the process of configuring backup tftp transfer files in the iMC's ICC function?

The TFTP protocol is based on a transport protocol between a server and a client. At first, the client sends a connection request to the server, and the server responds and the connection is established. Then the client sends a file transfer request to the server, the server splits the file needed by the client into several small blocks and passes them to the client in turn, the client sends an answer to the server after receiving each small block, and the server sends the next small block after receiving the answer. When all the file blocks have been transferred, the two are disconnected. 

The TFTP server program usually listens for client requests on port 69. It is important to note that when the server is transferring chunks of data to and from a client, the server uses a random port instead of port 69 for listening to requests, in order for the server to be able to respond to multiple client connections at the same time. The server uses different ports for data communication with different clients, which ensures that the data blocks required by different clients are not mixed up.

 Because of the uncontrollable random ports involved, it is recommended that the firewall be put through by IP.