Freeware includes ssh terminal and file transfer support for Mac OS?
UNIX Philosophy

macOS is built upon a UNIX philosophy. In your situation, that means many smaller dedicated tools instead of one monolithic tool. Most of the features you want are part of built-in macOS tools. These tools are accessible by macOS's included Terminal.app.


For Secure Shell connections, use ssh
For network file transfers, use scp or rsync
Port forwarding is typically part of your router's interface, not the local computer.