Re: X11Forwarding strangeness

From: Darren Tucker (dtucker_at_gate.dodgy.net.au)
Date: 11/18/05 

Date: 18 Nov 2005 01:20:22 GMT

On 2005-11-09, wim <wimpunk@gmail.com> wrote:
> I have a remote server acting strange. `ssh -X myserver` functions only
> correct if I use `X11UseLocalhost yes`. After changing the setting
> `X11UseLocalhost no`, ssh reuses my $DISPLAY setting AND it only works
> correcty the second time.
> So on the first connection I get `DISPLAY=myserv:10` but trying xterm
> gives me `xterm Xt error: Can't open display: myserv:10.0`. Setting up
> another connection to the same server, I get `DISPLAY=myserv:10` again
> and xterm works fine.

Assuming you are using OpenSSH, I think this is the following bug:
http://bugzilla.mindrot.org/show_bug.cgi?id=1076

The underlying cause is that some of the connect leave the TCP socket
in FIN_WAIT states, and when sshd attempts to listen on those ports
without the SO_REUSEADDR flag, it fails. This will be fixed in the
next release (4.3).

> (Please, CC me. Not following this group)

No, if you post it here then you read it here. 

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.