Interactive SSH client for RDi?

Hello everyone! I was just trying to do something I thought would be simple.  As part of my foray into MKDocs (which rocks big time, by the way), I have been running KiTTY as an SSH client and everything works fine.  I use RDi to edit my MKDocs source (just a bunch of text files in the IFS) and then I use KiTTY to run the MKDocs build command and then I run a green screen CPY command to move the objects from the MKDocs target to my Apache server instance.  All is well, but I wanted to try to stay inside of RDi for everything.  For the 5250 session, that was easy; I right click on the connection and take the Host Connection Emulator option.  Boom, up comes a 5250 session. But then I try to do the same thing for Launch Shell, I get an error:

Connection to QShell server timed out.
Check firewall and open ports 2850, 2851 and 2852.

Since I'm on a VPN, I don't know why I'd have ports disabled, so I tried Verify Connection, and it told me the callback to RSE daemon failed, because the callback both to my IP address on port 4301 and to my fully qualified PC name both failed.  So before I go back to my operations folks, I just wondered if someone could tell me what these errors might mean.  I think it's saying that the IBM i can't see my PC, but is that necessary to start an SSH session?  As noted, KiTTY works.

And also, in the interests of trying to find another solution to the issue, does anyone know of a different SSH client plugin that works in RDi?  The last one I tried (Remote System Explorer) didn't like my RDi configuration but happily told me it would uninstall the Software Development Platform if I so desired. That would be less than optimal, so I'm on the lookout for another SSH client.

At the end of the day, using KiTTY is fine.  I just was looking for a way to do everything from RDi.