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I am trying to run firefox on a remote server over ssh and use X11 forwarding to open the window on my laptop, but when I try to it throws the "PuTTY X11 proxy: No authorisation provided" error. I cannot find any reference to this error anywhere, and the only mention remotely close to it is here: Error Putty X11 proxy: Authorisation not recognised and none of these solutions helped at all. I can run most X11 applications, which is the reason I am bringing this here. I have tried xeyes, xclock, gedit, and netsurf, and all work completely fine. The problem is whenever I open firefox (or midori or browsh) I get this error. The full error is below:

PuTTY X11 proxy: No authorisation provided
Error: cannot open display: server:10.0

I am aware that "no authorization" has been provided to X11, but I do not know what authorization it wants or needs or on what end.

For reference, I am using Ubuntu 22.04.3 LTS on the remote end and windows 11 on my laptop.

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  • 1
    Are you on Ubuntu, or some other distro that uses Snap for Firefox?
    – grawity_u1686
    Commented Feb 16 at 21:30
  • I am using Ubuntu 22.04.3 LTS, I forgot to mention it, I'll add it to the post.
    – Isaakfire
    Commented Feb 17 at 22:55

1 Answer 1

Reset to default
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For me it was related to firefox installed with apt but which still using a snap version underneath

I added the following line in my .bashrc and it did the trick

export XAUTHORITY=$HOME/.Xauthority

There is more explication in this link https://www.technomancer.com/archives/616

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  • My issue was related to that and this worked great! I believe I also forgot to add export XAUTHORITY=$HOME/.Xauthority to my bashrc.
    – Isaakfire
    Commented May 7 at 18:14

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