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Re: [PLUG] ssh and X forwarding mystery
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OK, mystery solved.
In /etc/hosts, I had an entry like
external_IP name
That external IP had changed, so now ssh was trying to do a reverse
lookup on its own IP (or something close to that description) and was
seeing the mangled-looking address that DCA gives customers instead of
the simple name that ssh thought it should be. So it wasn't happy with
the results of the DNS query.
Changed /etc/hosts to reflect the new IP, all works fine now.
-Jeff
On Wed, Oct 11, 2000 at 10:48:55AM -0400, Jeff Abrahamson wrote:
> 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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