On 06/19/2014 04:25 PM, Andrew DeFaria wrote:
This is something that's been bothering me for a long time and I thought I might look into it a little deeper. I'm not sure if I should post this here because it involves Cygwin/X but it also involves OpenSSh.
Actually, this is probably off-topic since I don't see anything Cygwin- specific about setting up ssh/X connections.
When I ssh into a Linux machine using ForwardX11 I get those familiar messages: Warning: untrusted X11 forwarding setup failed: xauth key data not generated and according to https://cygwin.com/ml/cygwin-xfree/2008-11/msg00154.html: The warning can be silenced by using ssh -Y, since that is what ssh -X is doing now anyway. However, I find -Y to be 20 times slower to log in than -X:
This is probably a configuraton issue since when I ssh into my Linux system, login time is roughly equivalent.
Adefaria-lt:time ssh cm-job-ldev01 echo 'hi' Warning: untrusted X11 forwarding setup failed: xauth key data not generated Warning: No xauth data; using fake authentication data for X11 forwarding. /usr/bin/xauth: error in locking authority file /home/adefaria/.Xauthority hi real 0m2.387s user 0m0.075s sys 0m0.446s Adefaria-lt:time ssh -Y cm-job-ldev01 echo 'hi' Warning: No xauth data; using fake authentication data for X11 forwarding. hi /usr/bin/xauth: error in locking authority file /home/adefaria/.Xauthority real 0m22.476s user 0m0.091s sys 0m0.477s Adefaria-lt: Bonus points if you can help me get right of the other errors!
I believe the error regarding the .Xauthority file has something to do with the permissions on the file. As for the warning, I believe you want to unset DISPLAY on your PC, set X11Forwarding to "yes" on your Linux machine in your sshd_config file, and X11Forward to "yes" in you ssh_config file (for instance) on your PC. At least, that's what I gathered from searching around on the net for the information. :-) I think it goes without saying that enabling X11Forwarding opens up some security holes in X. Oops, looks like I said it anyway. ;-) -- Larry _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
