Is there any SCP program available for Ubuntu that does not require SFTP on a remote host?
Solution 1:
Update : The problem here is that openwrt does not support linux clients without installing the sftp server.
See https://wiki.openwrt.org/doc/howto/sftp.server
openwrt has no intention of resolving this, see https://trac.cyberduck.io/ticket/4161
So, from the first link, the solution , server side, is to install openssh-sftp-server
opkg update
opkg install openssh-sftp-server
You can then use any number of graphical clients or sshfs - see What is a program similar to WinSCP? and What is a program similar to WinSCP?
Alternate is to use winscp with wine
sudo apt-get install wine
wine winscp.exe
Solution 2:
FAR Manager for Linux recently got support of SCP. Currently it has bugs but you may try.
To install from PPA
sudo add-apt-repository ppa:far2l-team/ppa
sudo apt-get update
sudo apt install far2l
far2l
Then press Alt+F2 (you may need to disable "Run Application" hotkey). Select NetRocks and press Shift+F4 to create a new connection config.