[OS X] X protocol error: BadWindow (invalid Window parameter) on protocol request 38

[Andy Jacobson]

Howdy,

	After my switch to Tiger, I would often have trouble with X11  
windows crashing when forwarded across SSH.  If I clicked on the  
window, or dragged it, it would vanish, and the error message "X  
protocol error: BadWindow (invalid Window parameter) on protocol  
request 38" would get printed in the terminal window.  I have just  
figured out how to avoid this, although I'm not sure I understand the  
security implications.

	Long about version 3.8 of OpenSSH (which is what OS X uses), a new  
switch was added:  "-Y" from the command line, or "ForwardX11Trusted  
yes" as a .ssh/config directive.  If you use this, the unstable X11  
forwarding problem will go away.  Tracking down the extent to which  
this compromises my X11 security is not something I care to engage in  
at the moment; anyone who understands this, or figures it all out is  
encouraged to send mail to osx at tazman.princeton.edu

	Thanks,

		Andy

--
Andy Jacobson
andy.jacobson at noaa.gov

NOAA/ESRL/GMD
325 Broadway GMD/1
Boulder CO 80305

303/497-4916



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://tazman.princeton.edu/pipermail/osx/attachments/20060222/4d1a459a/attachment.htm