No connection could be made because the target machine actively refused it

On Windows machine,

I start a server on port 62325

$ netsh firewall show state shows:
Ports currently open on all network interfaces:
Port Protocol Version Program
-------------------------------------------------------------------
62325 TCP Any (null)

But when another client on different machine tries to connect to that port it shows on that client machine:

Ero 10061 : No connection could be made because the target machine actively refused it

Though loopback(127.0.0.1) for a client on the same machine works.

Full code: https://stackoverflow.com/questions/36083310/no-connection-could-be-made-because-the-target-machine-actively-refused-it-error