# VNC - Failed to connect to server

**URL:** <https://discourse.openondemand.org/t/vnc-failed-to-connect-to-server/4662>\
**Category:** Get Help\
**Created:** [December 2, 2025, 9:09am UTC](https://discourse.openondemand.org/t/vnc-failed-to-connect-to-server/4662 "2025-12-02T09:09:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![VittoCon](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/vittocon/32/2512_2.png) [@VittoCon](https://discourse.openondemand.org/u/VittoCon)\
**Post date:** [December 2, 2025, 9:09am UTC](https://discourse.openondemand.org/t/vnc-failed-to-connect-to-server/4662/1 "2025-12-02T09:09:38Z")

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Hi everyone,  
I’m trying to set up the remote desktop. The job starts correctly, and I can see the “Launch Desktop” button, but when I click it, it opens a screen showing “noVNC – Failed to connect to server.”  
Below I’m including the files generated by the session.

[connection.yml](https://discourse.openondemand.org/uploads/short-url/kHp3vJzzX5a3Ozrl467ZTpY07bw.yml) (95 Bytes)

[output\_log.txt](https://discourse.openondemand.org/uploads/short-url/ynmfYKS0F2rU7eYMz3YEQsdn6al.txt) (2.2 KB)

[user\_defined\_context.json](https://discourse.openondemand.org/uploads/short-url/qrNYtICNkz0kHlkHfQ8wVMHAKY5.json) (240 Bytes)

[vnc\_log.txt](https://discourse.openondemand.org/uploads/short-url/9jJdllKN1gzDburlVP2qVC8nZWY.txt) (1.4 KB)

[websockify\_log.txt](https://discourse.openondemand.org/uploads/short-url/As0VRvZFYuvCiHKTM8tCQnVpa19.txt) (133 Bytes)

[before\_sh.txt](https://discourse.openondemand.org/uploads/short-url/hWZc5X0xDqYXTpvkrcpSoUuhAQV.txt) (261 Bytes)

[job\_script\_content\_sh.txt](https://discourse.openondemand.org/uploads/short-url/yGyFmBrIfD2359c0Q1So7Yhy2ck.txt) (8.5 KB)

[script\_sh.txt](https://discourse.openondemand.org/uploads/short-url/5UQkHlrTP5tHhfDwuIv0o1jM9JS.txt) (813 Bytes)

[job\_script\_options.json](https://discourse.openondemand.org/uploads/short-url/9Ekwo36OXcevAEDUiIDgJdDmBvi.json) (592 Bytes)

Has anyone run into a similar issue or can help me solve it?  
Thank you very much,  
Vittorio

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**Author:** ![jeff.ohrstrom](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/jeff.ohrstrom/32/136_2.png) [@jeff.ohrstrom](https://discourse.openondemand.org/u/jeff.ohrstrom)\
**Post date:** [January 12, 2026, 2:54pm UTC](https://discourse.openondemand.org/t/vnc-failed-to-connect-to-server/4662/2 "2026-01-12T14:54:00Z")

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Sorry for the delay in a response - As a guess, I’d ask if you’ve enabled `rnode_uri` and `node_uri` in `ood_portal.yml` by following these instructions below:

> **[3. Enable Reverse Proxy — Open OnDemand 4.0.0 documentation](https://osc.github.io/ood-documentation/latest/how-tos/app-development/interactive/setup/enable-reverse-proxy.html)**

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**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/osc/original/2X/b/bae70bd0ed39a3ae769c2108155f4cb3e9da8385.png) [@system](https://discourse.openondemand.org/u/system)\
**Post date:** [July 11, 2026, 2:54pm UTC](https://discourse.openondemand.org/t/vnc-failed-to-connect-to-server/4662/3 "2026-07-11T14:54:23Z")

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