I have a problem similar to the already posted SSH access to office host behind NAT router to access from a homepc an OfficePc using a server with no root access the given solution was:
youatwork@officepc$ autossh -R 12345:localhost:22 notroot@serverpc
Later:
you@homepc$ autossh -L 23456:localhost:12345 notroot@serverpc
you@homepc$ ssh youatwork@localhost -p 23456
Provided by @piskvor That works nicely, but I have one problem if the officepc resets because a power cut I can't connect any more to officepc I don't know if the solution provided by @Velmont will work, thanks!