在Linux中，是否可以将两个连接从相同的客户端端口连接到不同的服务器端口？

Question

Say, the IP address of my Linux system is 10.0.0.2.

Is it possible, under any imaginable circumstance, that there are two connections that may look like the following, ie two connections with the same client port (eg 10.0.0.2:21426 ) connecting to two separate server ports (eg 10.0.0.2:5000 and 10.0.0.2:5001 )?

10.0.0.2:21426 --> 10.0.0.2:5000
10.0.0.2:21426 --> 10.0.0.2:5001

I don't care if the two client ports belong to the same process or different processes. I also don't care if the two server ports belong to the same process or different processes.

I just want to know if there is any possible situation where the above mentioned scenario is possible.

Answer 1

Yes, this is possible. A good example of this is FTP, where multiple file transfers in active mode would all originate from 10.0.0.2:20 to the various clients.