This is the error I am getting: Failed to connect to the remote extension host server (Error: WebSocket close with status code 1006).
This is the extension I have used and followed: Remote - Tunnels - Visual Studio Marketplace
It works on VSCode but I get the error message with Cursor. I have perused the existing bug reports and I haven’t found this one logged yet, apologies if I overlooked one.
What version of Cursor are you using?
Also, please provide your log data by following this instruction:
Just a note, SSH currently works only on macOS and Linux
I’m experiencing the same issue: I am unable to connect to a remote server using the Remote-Tunnels extension. I can successfully connect to the server using VSCode, but the problem only occurs with Cursor.
FYI, I can connect to the same server using Remote-SSH both with Cursor and VSCode.
The remote server is Linux-based.
My system info:
Version: 0.42.3
VSCode Version: 1.93.1
Commit: 949de58bd3d85d530972cac2dffc4feb9eee1e40
Date: 2024-10-16T17:56:07.754Z
Electron: 30.4.0
Chromium: 124.0.6367.243
Node.js: 20.15.1
V8: 12.4.254.20-electron.0
OS: Windows_NT x64 10.0.22631
I also found this line in my remoteTunnelService.log file:
2024-10-17 20:28:20.543 [error] Missing ‘tunnelApplicationConfig’ or ‘tunnelApplicationName’ in product.json. Remote tunneling is not available.
Try reinstalling the extension, and if that doesn’t work, reinstall Cursor following this guide:
Hi same here, reinstalling cursor on Mac did not help.
I am trying connect to vscode server with cursor as described here Remote Tunnels
Thanks
ok so I reply to my self 
on linux server needs to be downloaded https://api2.cursor.sh/updates/download-latest?os=cli-alpine-x64 and run ./cursor tunnel then one can connect from cursor installed on client
@deanrie I tried re-installing the extension and then Cursor using the instructions you provided, but none of them solved the problem. I can still use VSCode to Remote-Tunnel to the same server, but cannot do it with Cursor! I’d appreciate any further guidance to address this issue.
@xpokor02 As far as I understood, you installed something on the SERVER that addressed the problem. I’m not sure I have this option as installating software on our computing cluster is only managed by admins. Also, I’m not sure whether the file you provided matches our cluster’s settings. Could you please provide some info on what the package you installed is and what it does?
Hi ,
Yes as I understand it, cursor has its own version of “vscode server” so to be able to use tunnel you need “cursor server and cursor client”
May I know if I can tunnel to a windows machine?
Hi, I figured out yesterday how to tunnel from Windows to Windows with Cursor. But it’s not simple.
My scenario is I’m developing an MCP server for winget, which is a Windows component. Coding on Linux and testing on Windows is cumbersome, so I wanted to stick to Windows only. I set up a Dev Box (cloud VM offering by Microsoft) and downloaded the cursor cli onto it, as mentioned throughout this forum. But that’s the linux cli, so no bueno.
VS Code does have a cli for windows. code tunnel does setup a tunnel, but Cursor can’t connect to that and set up a Cursor server. So what I ended up doing was installing Cursor on the Dev Box and then run cursor tunnel. (should be in your PATH - if not, start a new shell)
Don’t use cursor-tunnel.exe which is also available! That one just returns:
No installation of Cursor stable was found.
If you already installed Cursor and we didn’t detect it, run
code version use stable --install-dir /path/to/installation
So run cursor tunnel, but only after you’ve opened Cursor on the remote machine and signed into Github or Microsoft. Then it works! Just open the Remote menu in Cursor on your local machine and connect to a tunnel. It will ask you to use Github or Microsoft, so choose what you registered the tunnel with. You should then see it by name. Select it and watch it connect - hopefully 
You can always look at the cli output on the remote machine to troubleshoot.
Extra note: the tunnel extension in Cursor never installed for me (available from the Remote menu with mention install) and I ended up downloading the VS Code tunnel extension vsix file and install that from cursor cli. This step may or may not have been needed for my setup to work. At this point, I can’t remember any more. But my tunnel has been working for two days now! I have had to unregister it once when it stopped working (cursor tunnel unregister) and start the tunnel again.
To get the vscode tunnel vsix, I installed it in VS Code, then you click on the gear icon for that extension and download it through there. Then you can run cursor --install-extension <path> and Bob’s your uncle. (referencing the extension by id never worked for me)
I hope this can be of help to some one. I’m currently on Cursor v1.1.3