reverse x11 tunneling versus ssh -X


Hello,

Here is the situation


Home -> Gateway -> Workstation


I normally use VNC and -L forwarding through the Gateway to
the desired workstation. This works fine, but some of my coworkers
would like to directly tunnel X11. The recipe below seems to work
fine:

home> ssh -X Gateway
Gateway> ssh -X Workstation
Workstation> xterm

This seems to work. But I would like to understand why the
following does not:

home> ssh -R 6001:127.0.0.1:6000 Gateway
Gateway> ssh Workstation
Workstation> DISPLAY=Gateway:1.0
Workstation> xterm

(Note: to generalize using port 60xx and DISPLAY=Gateway:xx.0)

Why doesn't this work?

Thanks.

.

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