Ah right, but this does not support bidirectional streaming so I won't be able to get the remote stdout on the client, I guess.
Remote:
$ socat TCP-LISTEN:4321,reuseaddr,fork EXEC:"bash -li",pty,stderr,setsid,sigint,rawer&
$ dumbpipe listen-tcp --host 127.0.0.1:4321
using secret key fe82...7efd
Forwarding incoming requests to '127.0.0.1:4321'.
To connect, use e.g.:
dumbpipe connect-tcp nodeabj...wkqay
$ dumbpipe connect-tcp --addr 127.0.0.1:4321 nodeabj...wkqay&
using secret key fe82...7efd
$ nc 127.0.0.1 4321
root@localhost:~#