Any network connection requires a TCP port be open and available on the server. There is an excellent list of common TCP ports at www.iss.net.
If you are using a non-standard port in TERM, you can specify the correct port by adding to the address, after a colon. For example:
term -l telnet:192.168.0.1:1023
will cause TERM to use telnet to connect to port 1023, rather than using the default port of 23. TinyTERM for DOS can also be configured this way.
In TinyTERM for Windows, you will need to go into the advanced setup for the telnet, SSH or SSL/TLS protocol. That dialog box will include a port number that can be edited.
At this writing, no file transfer protocol has this capability. This includes FTP in the emulator, as well as the protocols available in the Century FTP Client or SecureFT. The NFS client and server likewise cannot be changed.
CR 235, Century FTP Client
CR 620, FTP in emulator
CR 828, SecureFT