Re: “Stripped-down” SSH (no encryption or authentication, just forwarding)

[Jeremy Lin]

On Tue, Oct 15, 2019 at 4:02 PM Demi M. Obenour <demiobenour at gmail.com> wrote:
>
> [...snip...] Essentially, this tool would be an “SSH
> subsystem” ― it would provide all of the forwarding features of
> sshd(8), but without encryption or authentication.  This is similar
> to how sftp-server(8) expects an already secure and authenticated
> connection.

You might want to investigate HPN-SSH (https://www.psc.edu/hpn-ssh),
which among other things, is supposed to support disabling encryption
and authentication, though this support isn't enabled by default.