Selecting protocol to transfer large (4GB) file through SSH port

My attempts to transfer a file to a remote Windows 7 computer have failed: - TeamViewer times-out - WinSCP times-out I am forced to re-start (vs. resuming) transferring the files. I have temporarily positioned the file on my Linux router and opened the SSH port for WinSCP. I can periodically access the remote (Windows 7) computer and WinSCP is available. It would be nice if WinSCP had rsync built-in. Is there a robust (can resume session disconnects) file transfer protocol or app that will persistently reconnect until the transfer is completed (through SSH port 22)? - Update: SFTP retrieved via ipkg to Linux router: SFTP tested and confirmed - Update: Only the SCP connection over port 22 connected.