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Re: ssh X forwarding not working



On Tue, Apr 04, 2000 at 08:53:27PM -0400, Dan Christensen wrote:
> When I connect to my laptop using ssh, X forwarding doesn't work.
> For example:
> 
>   jdc@scratchy:~% ssh localhost xterm
>   X11 connection rejected because of wrong authentication.
>   
>   X connection to scratchy:11.0 broken (explicit kill or server shutdown).
>   jdc@scratchy:~% ssh localhost echo \$DISPLAY
>   scratchy:12.0
> 
> When I connect from the laptop to other machines, forwarding works
> properly.  I have forwarding turned on.

This sounds like a bug that's been in openssh for a while. Try this:
* login to the laptop
* "xauth list"
* you should see output something like this (don't worry if it doesn't
  match exactly)
    scratchy.foo.bar:11  MIT-MAGIC-COOKIE-1  b3ddeb59fa5ded5bab071da1e07
    ^^^^^^^^         ^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
* Take that information above, and execute this command:
    xauth add scratchy/unix:11 MIT-MAGIC-COOKIE-1 b3ddeb59fa5ded5bab071da1e07
              ^^^^^^^^      ^^ ^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^

If X suddenly works, then it is the bug. The problem is that X uses unix
domain sockets when it realizes it's connecting to the local host, but
openssh only provides authority info for tcp sockets.

Hopefully this gets fixed soon...


-- 
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