e-smith has OpenSSH built in. I have however managed to achieve my objective. I initially changed the settings in e-smith, and then chose the client software you suggested (PuTTY and Winscp), but could not establish a connection. I don't know why ??
I then used a How-To contributed by Darrell May, which uses an ibay to develop a webconsole & connection using Mindterm. I made a slight modification to his How-To, so that I am using the latest version of Mindterm. Hey Presto, no more KVM and this allows me access from my own network, as well access when I am not at home.
My next task is to find an easy way to find and copy files. I am now reading about Midnight Commander you suggested. Being a newbie myself, I ccould sure do with an explorer type GUI to navigate around the e-smith box.