usage example

Edit or create new remmina server connection

schema

~/.ssh/rdp-tunnel.sh ACTION TUNNELNAME LOCAL_PORT:REMOTE_SERVER:REMOTE_PORT TUNNEL_PROXY

name	description
ACTION	start|stop
TUNNELNAME	"string identify socket" slugify to create socket file into ~/.ssh/sockets/string-identify-socket.control
LOCAL_PORT	the door that will be exposed locally if we use the same port for two connections it will crash
REMOTE_SERVER	the ip of the server that you would access if you had it on the proxy server that will be used
REMOTE_PORT	the service port that runs on the server
TUNNEL_PROXY	the connection you are going to use as a proxy, it needs to be in your ~/.ssh/config preferably using the access keys

I use the combination (% g-% p) of the remmina group name and connection name to be my TUNNELNAME (this needs to be unique, it will see the socket name)

pre-command

~/.ssh/rdp-tunnel.sh start "%g-%p" 63394:192.168.8.176:3389 tunnel-name-1

post-command

~/.ssh/rdp-tunnel.sh stop "%g-%p" 63394:192.168.8.176:3389 tunnel-name-1

you can and should use this script to access anything, I use it constantly to access systems and services that do not have a public ip going through 1,2,3,4,5 or more ssh proxies

see more into :

1. ssh config
2. ssh mach
3. ssh jump hosts
4. sshuttle python ssh

Refs:

1. https://remmina.org/remmina-rdp-ssh-tunnel/
2. https://kgibran.wordpress.com/2019/03/13/remmina-rdp-ssh-tunnel-with-pre-and-post-scripts/
3. https://stackoverflow.com/questions/2241063/bash-script-to-setup-a-temporary-ssh-tunnel/15198031#15198031
4. https://gist.github.com/oneohthree/f528c7ae1e701ad990e6