Untrusted X11 Forwarding Setup Failed Xauth Key Data Not Generated
Untrusted X11 Forwarding Setup Failed Xauth Key Data Not Generated 4,4/5 2268 reviews
  1. Nov 08, 2018  Warning: untrusted X11 forwarding setup failed: xauth key data not generated Warning: No xauth data; using fake authentication data for X11 forwarding. Although I got those warnings, I still typed xterm& and opened a new xterm which comes from redhat. Then try 'xclock&'. It displayed!! Now, I have an other question.
  2. Warning: untrusted X11 forwarding setup failed: xauth key data not generated Warning: No xauth data; using fake authentication data for X11 forwarding. The xauth call seems to fail, so I tried (not knowing if thats the right way to solve this.).
  3. As I have posted earlier, Cmder is a better option if you use Windows command line frequently. The full installation of Cmder comes with Git for Windows, which is handy to provide a Linux-like environment. In this post, I will write about how to use Git for Windows to connect to a remote CentOS server and set up X11 forwarding to use the GUI applications on that server.
Untrusted X11 Forwarding Setup Failed Xauth Key Data Not Generated

Untrusted X11 Forwarding Setup Failed Xauth Key Data Not Generated Working

Hi Rod and all,
Thank you so much for your help. I tried what you've suggested. It works! I am so happy for that. But there is still some warnings.
What I've done as below:
My redhat is a new server running redhat enterprise server 6. There isn't ssh2_config file. So like what I did yesterday, I uncommented a line contains 'X11Forwarding yes' in sshd_conf.
Back to Mac, in terminal, type 'xterm&'. In a X terminal, using ssh login to redhad, as Rod suggested. I can login but got two warnings:
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
Although I got those warnings, I still typed xterm& and opened a new xterm which comes from redhat. Then try 'xclock&'. It displayed!! So great!
Now, I have an other question. I opened 'firefox' from xterm. Firefox was also booted up, but the letters on menu and top bar were blurred. And the warnings I got were:
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Have you ever met such problem?
This is a new problem. But I already feel so happy that you help me solved a problem which had bothered me for more than three days! Thanks all your help!

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Untrusted X11 Forwarding Setup Failed Xauth Key Data Not Generated In 2016

Hi Rod and all,
Thank you so much for your help. I tried what you've suggested. It works! I am so happy for that. But there is still some warnings.
What I've done as below:
My redhat is a new server running redhat enterprise server 6. There isn't ssh2_config file. So like what I did yesterday, I uncommented a line contains 'X11Forwarding yes' in sshd_conf.
Back to Mac, in terminal, type 'xterm&'. In a X terminal, using ssh login to redhad, as Rod suggested. I can login but got two warnings:
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
Although I got those warnings, I still typed xterm& and opened a new xterm which comes from redhat. Then try 'xclock&'. It displayed!! So great!
Now, I have an other question. I opened 'firefox' from xterm. Firefox was also booted up, but the letters on menu and top bar were blurred. And the warnings I got were:
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Have you ever met such problem?
This is a new problem. But I already feel so happy that you help me solved a problem which had bothered me for more than three days! Thanks all your help!