[PLUG] ssh and X forwarding mystery

[Jeff Abrahamson <abrahj01@molbio.sbphrd.com>]

Up until yesterday morning, I was using ssh to log in to my home
machine from work. Yesterday, it stopped working: ssh connects,
DISPLAY is set, but X clients just hang with (sometimes) the following
error message after a while:

connect gw.purple.com:6012: Connection timed out
Error: Couldn't find per display information

After that error, I'm still logged in via ssh, it's just the X client
that gave up.

I'm using the same ssh I've been using for months:

  SSH Version 1.2.27 [i486-unknown-linux], protocol version 1.5.
  Standard version.  Does not use RSAREF.


The only thing that changed was my ISP, but I can't port forward at
home over my 100baseT network, either, so I don't think my new ISP
(DCA) has anything to do with this.

  [davinci] ssh gw
  password: ...
  [gw] xclock
    <hang here>

  # davinci and gw are both internal hosts, although gw has the
  # outside network interface as well.


I checked for sshd_config and ssh_config files: nothing is specifying
that X11 forwarding should not work. Anyway, as I said, DISPLAY is
being set properly:

  [davinci] ssh gw
  password: ...
  [gw] echo $DISPLAY 
  gw.purple.com:13.0
  [gw]


Any thoughts? Hunting on the web (google and deja) hasn't turned up
much.

Tia.

-- 
 Jeff Abrahamson
 610/270-4845
 abrahj01@molbio.sbphrd.com


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